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THE  DECENNIAL  PUBLICATIONS 


ME  AS  I  RKS    OF    DOUBLE    STARS 

BY 

SHERBURXE    WESLEY    BURXHAM 


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THE  DECENNIAL  PUBLICATIONS 


MEASURES  OF  DOUBLE  STARS  WITH  THE  40-INCH 
REFRACTOR  OF  THE  YERKES  OBSERVATORY 
IN  1900  AND  1901 

BT 

SHERBURNE   WESLEY  BURNHAM 

>\ 

PROFESSOR  OF  PRACTICAL   ASTROXOJCY  AXD  ASTRONOMER  IX  THE  TEREES  OBSERVATORY 


PRIKTED  FROM  VOLUME  VIII 

«*" 


CHICAGO 

THE  UNIVERSITY  OF  CHICAGO  PRESS 
1902 


Copyright  1903 
BY  THE  UNIVERSITY  OF  CHICAGO 


MEASURES  OF  DOUBLE  STARS  WITH  THE  40-INCH  REFRACTOR 
OF  THE  YERKES  OBSERVATORY  IN   1900  AND  1901 

S.  W.  BCBNHAM 

THE  double-star  measures  recorded  here  were  made  principally  in  the  years  1900  and  1901. 
The  observations  preceding  this  period  were  almost  entirely  of  the  /8  stars ;  and  the  mean  results  have 
been  incorporated  in  the  "General  Catalogue  of  1290  Double  Stars"  discovered  by  the  writer  from 
1871  to  1899,  and  issued  in  1900  as  Vol.  I  of  the  Publications  of  the  Yerkes  Observatory.  The  detailed 
measures  have  not  been  printed,  but,  as  the  results  have  been  given  in  connection  with  all  the 
measures  of  these  stars,  arranged  in  chronological  order,  I  have  not  thought  it  worth  while  to  give 
the  separate  observations. 

In  making  the  working-list  of  objects  for  measurement,  the  purpose  was  to  include  no  star  likely 
to  be  observed  elsewhere,  and  to  confine  it  wholly  to  long-neglected  and  little-known  pairs,  and  those 
which  for  the  lack  of  sufficient  measures,  or  the  uncertainty  of  the  early  results,  could  not  be  classified 
as  to  motion  or  otherwise.  These  stars,  so  far  as  the  early  astronomers  are  concerned,  come  largely 
from  the  several  catalogues  of  the  two  Herschels  and  South,  with  some  of  the  rejected  Struve  pairs 
also  catalogued  and  roughly  measured  by  Herschel  II.  Many  of  these,  and  particularly  those  from 
Herschel  I.  and  South,  are  wide  pairs,  and  too  widely  separated  to  be  considered  by  modern  observers 
as  double  stars  in  the  proper  sense  of  the  term ;  and,  whenever  change  has  been  found  in  this  class  of 
objects,  it  is  very  probable  that  it  is  due  to  the  proper  motion  of  one  or  the  other  of  the  components. 
In  the  other  class,  where  the  distances  are  less,  the  changes,  if  confirmed  by  later  observations,  may 
point  to  physical  systems,  though,  of  course,  the  orbital  movement  would  of  necessity  be  slow.  It 
seemed  very  desirable  that  these  stars,  among  the  oldest  known  so  far  as  the  literature  of  the  subject 
is  concerned,  and  observed  by  the  most  eminent  astronomers  who  have  ever  lived,  should  receive 
sufficient  attention  from  modern  observers  to  show  whether  or  not  in  this  long  interval  there  has  been 
any  relative  motion.  In  many  instances  the  measures  now  made  do  not  satisfactorily  determine  this, 
since  the  apparent  change  may  be  accounted  for  by  errors  in  the  single  observations  made  when  the 
pair  was  first  catalogued,  and  another  series  of  measures  at  some  later  time  may  be  necessary. 

It  will  be  seen  that  in  many  of  these  stars  there  are  great  apparent  changes,  and  it  is  practically 
certain,  after  making  all  due  allowance  for  the  early  observations,  that  many  of  these  changes  are  real. 
The  measures  of  Herschel  II.  consist  usually  of  a  single  reading  for  the  position-angle  and  an  estimate 
of  the  distance.  The  angles  are  generally  very  accurate,  so  far  as  one  can  judge  from  the  better-known 
class  of  stars  catalogued  by  him;  but  the  distances,  and  particularly  those  which  are  under  10",  would 
seem  to  be  very  frequently  underrated,  so  that  many  of  the  apparent  changes  in  this  respect  will 
probably  not  prove  to  be  real.  The  observations  were  all  made  seventy  or  eighty  years  ago,  and,  with 
few  exceptions,  these  pairs  have  been  entirely  neglected  since  that  time.  A  slow  movement  of  any 
kind  would  make  a  decided  change  in  the  relation  of  the  components  after  such  an  interval  of  time. 
Another  set  of  measures  twenty  or  thirty  years  hence  will  dispose  of  the  question  of  motion  and 
eliminate  many  of  these  objects  with  respect  to  any  further  attention. 

The  neglected  pairs  of  Herschel  I.  and  South  belong  largely  to  the  wider  classes,  and  therefore 
were  not  incorporated  by  Struve  in  Mensurae  Micrometricae.  Some  of  the  pairs  of  the  first  observer 
have  not  been  observed  at  all  since  that  time,  the  interval  being  about  a  century  and  a  quarter.  The 
measures  of  South  were  made  about  1825,  and  the  objects  taken  from  his  catalogue  have  either  not 
been  measured  since  at  all,  or  the  later  measures  indicate  some  change. 

Another  class  of  stars  selected  for  measurement  has  been  taken  from  various  star  catalogues  where 


MEASURES  OF  DOUBLE  STARS 


the  star  was  noted  as  double  by  the  meridian  observer.  These  catalogues  include  Weisse,  Argelander, 
Harvard  Zones,  some  of  the  A.  G.  catalogues,  and  others.  These  pairs  have  not  been  previously 
measured.  Some  of  them  are  likely  to  prove  to  be  physical  pairs. 

Some  of  the  neglected  OS  stars  were  put  on  the  list,  but  on  the  appearance  of  Hussey's  complete 
re-observation  of  all  the  Poulkowa  stars  (Publications  of  the  Lick  Observatory,  Vol.  V)  further 
measures  were  unnecessary,  and  this  part  of  the  work  was  discontinued.  The  wide  pairs  noted  by 
O2,  which  correspond  to  similar  pairs  given  in  Appendices  I  and  II  to  the  Mensurae  Micrometricae, 
of  which  there  are  no  measures  since  the  observations  of  Dembowski,  some  twenty-five  years  ago, 
have  been  measured  to  ascertain  whether  or  not  there  has  been  any  change  since  that  time. 

A  further  class  of  pairs  has  been  taken  from  more  modern  works,  which  include  some  of  the 
pairs  recorded  by  the  several  observers  at  the  Cincinnati  and  Harvard  College  Observatories,  and 
others  still  more  recently  catalogued.  Many  of  these  were  given  only  approximate  places  and  a 
single  measure  for  the  relative  position.  In  all  cases  the  error  of  place  has  been  corrected,  and  the 
object  identified  in  the  D.  M.  or  some  other  star  catalogue.  In  a  few  instances  the  pair  could  not  be 
found  at  all  after  a  careful  search  in  the  vicinity  of  the  assigned  place. 

The  observing-list  of  stars  selected  in  this  way  would  obviously  be  a  long  one,  and  the  work  laid 
out  is  far  from  being  finished.  The  observations  which  follow,  amounting  to  about  fifteen  hundred 
measures,  include  only  the  pairs  which  have  been  measured  on  at  least  two  nights.  Those  which  have 
been  measured  once  only  must  be  given  in  a  later  series.  A  large  number  of  pairs  are  still  to  be 
measured  for  the  first  time. 

The  method  of  making  the  measures  has  been  too  often  described  to  need  repeating  here,  since  it 
is  practically  the  same  with  all  observers  who  use  the  micrometer.  Double  distances  have,  of  course, 
been  taken,  and  a  sufficient  number  of  readings  made,  usually  three  to  five,  to  give  as  good  a  mean  as 
the  observer  can  attain.  From  a  large  number  of  transits,  arid  measures  of  difference  of  declination 
of  well-determined  stars,  by  Professor  Barnard  and  myself,  the  value  of  9f666  for  one  revolution  of 
the  micrometer  has  been  adopted. 

In  the  course  of  these  observations  a  few  new  pairs  have  been  picked  up,  which  are  given  at  the 
end  of  the  other  measures.  These  are  numbered  in  continuation  of  my  prior  lists  from  1291  to  1308 
inclusive.  The  reason  why  this  number  of  new  pairs  is  not  larger  will  be  readily  understood  when  it 
is  explained  that,  in  the  first  place,  the  finding  of  new  pairs  was  no  part  of  the  work  planned,  and  no 
time  was  spent  in  the  examination  of  adjacent  stars;  and,  in  the  second  place,  for  all  stars  smaller 
than  7.5  magnitude,  diagrams  were  carefully  platted  to  scale  from  the  D.  M.  catalogues,  showing  the 
place  of  the  pair  sought  and  all  the  other  stars  in  the  vicinity,  down  to  the  Argelander  limit,  within  a 
radius  of  about  one  degree.  This  preparation  was  essential  in  the  interest  of  saving  time  in  finding 
the  object,  and  for  the  purpose  of  properly  identifying  it.  Hence,  except  in  cases  where  the  given 
place  was  erroneous,  the  proper  star  could  be  placed  in  the  field  at  once  without  loss  of  time,  and  no 
attention  given  to  the  other  stars  in  the  neighborhood.  With  any  other  plan,  doubtless,  a  large 
number  of  new  pairs,  of  more  or  less  apparent  interest,  would  have  been  found,  but  necessarily  it 
would  have  seriously  interfered  with  the  carrying  out  of  the  arranged  program,  which  would  require 
at  least  several  years  thoroughly  to  complete ;  and  it  seemed  much  more  important  at  this  time  to 
correct  the  descriptions  and  places  of  the  stars  recorded  by  some  of  the  first  observers,  and  get  data 
for  learning  something  of  the  movement  of  these  long-neglected  pairs.  The  old  and  well-known 
double-star  systems  are  in  no  danger  of  being  overlooked,  and  there  has  always  been  an  unnecessary 
duplication  of  the  measures  of  these  pairs. 

The  star-places  given  are  for  1880. 


S.     W.     BUBNHAM 


I. 
S  3065  re/.    S.D.(15°)3.    8.6 

R.A.    =0"  1-51' 
Decl.  =  -  14°  54' 

1901.796      289? 2 
.854       289.1 


MEASURES   OF   KNOWN    DOUBLE   STABS 
.8.7 


1901.82  289.1 

No"  other  measures  of  this  pair. 


9:44 
9.55 

9.49 


S  3064  rej.    7.2  ...  10.4 

R.A.    =0"   2m10s 
Decl.  =  +  39°  26' 

1901.722  358?  1 

.796  356.4 


1901.76 


357.2 


23:91 
23.80 

23.85 


The  only  other  measures  are  by  H,  351  ?1  :  20"  ± 
(1830). 

p  Cassiopeiae.    2  ...  15 

R.A.    =  Oh  2""1  43s  ) 
Decl.  =  +58°  29'  \ 

1900.684  204?5  22?88 

.725  204.0  22.44 


1900.70 


204.2 


22.66 


The  only  other  measures  of  the  Clark  companion 
are  my  own  in  1889.  The  principal  star  has  a  proper 
motion  of  0'550  in  110?2.  This  movement,  with  the 
measures  of  1889,  gives  the  position  of  the  small  star 
for  the  date  of  the  above  measures,  204?8  :  22'28. 
It  is  therefore  certain  that  the  companion  is  fixed  in 
space. 


R.A. 

=  0"  2™  51s  / 

Decl. 

=  +58°  58'  } 

1901.818 

145?  1 

23:44 

.835 

144.6 

23.26 

1901.82  144.8  23.35 

"  Duplex ''  in  O.Arg.  No  other  measures.  These 
stars  are  D.M.(58°)4  and  5.  The  A.G.  positions  give 
143?6  :  2:592  (1873. 7). 


H  1001.     D.M.(43°)7.     8.5  ...  9.1 

.    =  Oh    2- 57s  ) 
1.  =  +  44°     3'  \ 


R.A.    =0" 
Decl. 


1901.722 

.758 

1901.74 


77?5 
77.7 

77.6 


15:80 
15.72 

15.76 


The  R.A.  in  H  is  lm  too  large.     He  gives  84?5  : 
13'  ± .    No  other  measures. 


H  1939.    8  ...  9.3 

RA. 
Decl. 

=  0"  3»41S  I 
=  +  10"  45'  \ 

1901.605 
.742 

161?2 
161.3 

34.'75 
35.09 

1901.67 


161.2 


34.92 

The  Decl.  in   H   is   5'   too  small.     By  a  single 
measure  in  1877  I  found  159?1  :  36 -'08. 


2  3.     Andromedae  51 

R.A.    =0"   3m495 
Decl.  =  +  45°  43' 


1901.722 

.758 

1901.74 


83?  4 
83.4 

83.4 


4:87 
4.79 

4.83 


H  notes  another  small  star,  133?0  : 4:57,  and  says: 
"Possibly  the  small  star  is  a  mere  illusion."  I  could 
not  see  anything  of  it  here,  or  attached  to  any  star 
in  the  vicinity.  No  change  in  the  S  components. 


S  6  rej.     D.M.(4")9.     8.9  . 

R.A.    =0h   41"   6s 
Decl.  =  +   4°  13' 

1901.605  192? 8 

.742  192.7 


1901.67 


192.7 


10.5 


21:20 
21.02 

21.11 


The  only  other  measures  are  by  the  Harvard  ob- 
servers, 193?2  :  22.'56  (1869.92)  1». 


H617.    D.M.(0°)9.    9.2. 

R.A.   =  Oh  5™    4 
Decl.  =  +   0°  36 

1900.706  61?8 

0.744  59.2 

1.742  60.9 


12.7 


13:57 
13.39 
13.13 


1901.06 


60.6 


13.36 


H  gives  55° ±  :  6"±  :  9  ...  14,  and  says  "a  third 
18m  at  4"  :  320C  suspected."  I  could  not  see  any 
other  companion. 


6 


MEASURES  OF  DOUBLE  STARS 


H  618.    D.M.(-0°)17.    9.6  ...  9.6 

R.A.    =  Oh    7  '"22s  / 
Decl.  =  -    0°  47'  \ 

1901.742               249?6                 5?33 
.854                 71.4                 5.16 

The  principal  star  has  a  very  small  proper  motion, 
0^057  in  236?0. 

Hdl7 

R.A.    =0"18m32s  ) 
Decl.  =     -    0°  37'  \ 

1901.80                 250.5                 5.24 
No  other  measures  ;  250°  ±  :  2"±  (1820)  H. 

H  1947.    7.3  ...  10.5 

R.A.   =  Oh10m    3s  ) 
Decl.  =  +42°  58'  \ 

1901.818                 75?6                 9'14 
.835                 75.1                 9.06 

Described  in  the  Harvard  observations,  sp  :  10"  : 
8  ...  12.    This  star  is  not  double,  and  no  such  pair 
found  in  the  vicinity  (1901.74). 

OS  10  rej.    L  581.    6.3  ...  8.9 

R.A.   =0"21m16s  ) 
Decl.  =  +  15°  22'  \ 

1901.742             .  237?6               100^55 
^^4.                9^8  rt                inn  OR 

1901.82                  75.3                 9.10 

.873               237.8               100.97 

The  principal  star  (Radcliffe  44)  has  a  small  proper 
motion  (Hon.  Not.,  LI,  398). 

1879.40        74?6        9^36        2w        OS 

W2  0.264.    8.5...  8.5 

R.A.    =0hllm  10'  ) 
Decl.  =  +  35°  10'  \ 

1901.835               107?0                 5.  '34 
.854                107.6                  5.25 

1901.82                 237.8               100.83 
The  first  measure  of  this  distant  star  is  : 
1866.68        237?0        96^34        3n        A 

The  A.G.  proper  motion  of  the  principal  star  is 
0.'092  in  286?2.    The  above  measures  give  0-'133,  so 
that  the  first  is  too  small,  or  the  other  star  has  a 
movement  of  its  own. 

H  322.    12  Ceti.    6.5  ...  11.7 

1901.84                 107.3                 5.29 

"  Duplex  4"  distance  "  in  Weisse.    The  only  meas- 
ure is  : 

1879.61        106?4        5^35        In        Gin 

R.A.    =  Oh23m55s  ) 
Decl.  =  -    4°  37'  \ 

1901.760               189?  4                 9  .'70 
.815               188.4                 9.52 
.818                188.8                  9.40 
.835               189.6                 9:53 

H  1951.    S.D.(12°)44.    8.6  ...  12.0 

R.A.    =  0»12m41s  ) 
Decl.  =  -  11°  37'  \ 

1901.796               217?9               22'72 
.854               217.1               23.03 

1901.81                 189.0                 9.54 
The  only  measures  are  : 
1866.76        185?2        8^66        3n        A 
1880.23        187.0        8.63        3n        ft 

1901.82                 217.5               22.87 
The  only  complete  measure  preceding  this  is  : 
1877.95        216?6        24f09        In        ft 

H  1953.    i  Ceti.    4  ...  12 

R.A.   =  0h13m195  ) 
Decl.  =  -    9°  30'  \ 

The  proper  motion  of  A  is  practically  zero. 

p  107 

R.A.    =  Oh24m31s  ) 
Decl.  =  +  62°  41  '  \ 

A  and  B 
1900.706                354?  9                  5-'71 
.725                353.2                  5.69 

1900.666                  17?0                63:00 
•668                 17.1               62.75 

1900.71                 354.0                 5.70 
AandC 

1900.66                   17.0               62.87 
The  other  measures  are  : 

1900.706               336?  7               46  .'94 
.725               336.7               46.62 

1880.31        15?5        6K96        2n        ft 

1900.71                  336.7                46.78 

S.    W.    BURNHAM 


1900.706 
.725 

1900.71 


1900.706 
.725 

1900.71 


1900.706 
.725 


A  and  D 
146?  5 
146.6 


146.6 

A  and  E 

170?9 

170.8 


170.9 

AandF 

114?1 

113.7 


50--28 
50.36 

50.32 


113 '59 
113.51 

113.55 


150'50 
150.48 


1900.71  113.9  150.49 

E  and  e 

1900.725         139?1         8^61         16m 
(See  Popular  Astronomy  for  December,  1900.) 


H  1982.    52  Piscium.    6 

R.A.   =  0h26m18s 
Decl.  =  +  19°  38' 

1900.684  304?2 

.687  304.1 


1900.68  304.2 

The  only  measures  are  : 

1830  +        309?6        25 '± 
1879.99        305.7        38.30 


12 


4T08 
41.28 

41.18 


In 
3n 


H 


The  distance  would  seem  to  be  increasing.    The 
proper  motion  is  very  small,  0'012  in  109?3. 


H  1038.    10.7  .  .  .  10.8 

R.A.   =0"29m19s 
Decl.  -  +63°     4' 

1901.722  111?0  3-77 

.818  109.3  3.81 


s  / 
'  \ 


1901.77 


110.1 


3.79 


The  only  position  is  by  H,  97?0  :  !£'  (1828);  "in 
contact  with  160;  just  separated  with  240."  I  looked 
this  up  in  1876  with  the  6-inch,  and  estimated  the 
distance  as  fully  2".  Not  in  D.M. 


H  1040.    10.9  .  .  .  11.2 

R.A.    =0" SI"  37s  ) 
Decl.  =  +  65°     7'  J 


1901.722 
.796 


355?  4 
353.3 


1901.76  354.3 

Hgives356?4:2'±  (1830). 


4f88 
5.18 

5.03 


H  3380. 

R.A.    =0"  33-°  35s 
Decl.  =  —  17°  23 


s  ) 
'  ) 


H  gives  96?2  :  30'=h  :  7|  .  .  .  13  (1836.78).  There 
is  no  bright  star  in  this  place,  and  I  could  not  find 
any  such  pair  in  the  vicinity.  It  may  be  identical 
with  H  2067,  which  is  lh  more  R.A.  The  descrip- 
tions agree. 

D.M.  (— 0°)75.    7.6  ...  11.5 

R.A.  =0h31-°56s 
Decl.  =  -   1"  10' 


1901.703 
.873 

1901.79 


307U 
306.5 

306.8 


30'46 
30.50 

30.48 


This  was  measured  for  S  53  rej.  No  other  obser- 
vations. The  principal  star  is  6.8m  in  D.M.,  and  has 
a  proper  motion  of  0-087  in  253?4. 


S  53  rej.    8.0  ...  8.7 

s  ) 
'  \ 


RA.   =0h37m18s 
Decl.  =  -    1°  32 


1901.735 
.854 


338?9 
338.3 


1901.76  338.6 

The  earliest  measures  are  : 
1891.81        334?6        26  M7 


27^79 
27.61 

27.70 


3n 


Engelhardt 

This  star  has  a  considerable  proper  motion ;  0'415 
in  216?6  (Porter);  0-'301  in  228?4  (Nico.  A.G.).  The 
smaller  star  is  probably  not  moving  with  the  other. 

H  1051.    11  ...  13.2 

R.A.   =0h38n'lls 
Decl.  =  +  24=    3' 

1900.706      221?0       6'52 
.780      221.2       6.88 


1900.74 


221.1 


6.70 


The  distance  seems  to  be  greatly  overestimated 
by  H,  as  in  nearly  every  instance  of  this  kind.  He 
gives  275?0  :  !£'  :  10  .  .  .  14  (1828).  It  is  near  D.M. 

(23°)98. 


H  626.    D.M.(30°)110.    8.5  ...  11  ...  12.5 

RA.   =0h39ra    7s 
Decl.  =  +  31° 

A  and  B 


7s  ) 
1°  \ 


1901.703 

.758 

1901.73 


345?  9 
346.4 

346.1 


32^16 
32.46 

32.31 


MEASUEES  OF  DOUBLE  STARS 


1901.703 

.758 

1901.73 


BandC 

105?  8 
107.1 


106.4 


10-54 
10.16 

10.35 


H  gives  330°  ±  :  20"  ±  :  9  .  .  .  14;  "  large  star,  very 
red."  The  third  star  was  not  seen  by  him.  A  is 
only  yellowish  at  most. 


H  1054.    D.M.(59°)125.    8.2  ...  10.5 


R.A.   =0"  42-°  31s  ( 
Decl.  =  +  60"    6'  \ 


1901.796 
.799 

1901.80 


182?  5 
181.6 


182.0 


8^75 
8.58 

8.66 


H  gives  176?0  :  5"±  :  9  .  .  .  13  (1828). 


Hd35.    S.D.(2°)110.    8.7 

R.A.   =0h42m28s  ) 
Decl.  =  -    2°  25'  \ 

1901.835  37?  1 

.873  37.0 


9.3 


6^86 
6.99 


1901.85 


37.0 


6.92 


From  the  Harvard  list.    The  only  measure  is : 
1867.89        37?4        l'.(A        In        Hd 


Hd  36 


R.A.   = 
Decl.  =  -  21° 


-I 


This  is  in  the  Harvard  list  as  O.Arg.S.439,  with 
the  correct  place  as  given  above.  The  description  is 
16?6  :  21'  :  7  ...  (1868.82).  This  star  is  not  a  double 
of  any  kind,  nor  is  there  any  pair  as  described  in  the 
vicinity.  The  nearest  pair  is  0301,  but  this  does  not 
correspond  in  any  respect  to  measures  or  magni- 
tude. 


OS(App)9.    8...  8.2 

R.A.    =0"  43 -21s 
Decl.  =  +  29°  48' 

1901.703  236?8  96^72 

.799  236.5  96.10 


96.41 


1901.75  236.6 

The  principal  star  has  a  proper  motion  of  0'263 
in  100?3  from  meridian  positions.  The  measures  of 
J  in  1875  compared  with  the  foregoing  give  0'217  in 


92?  1.    There  is  a  12m  star  nearly  midway,  from  A 
252?7  and  from  B  42?5. 


H628.    7.7...  11.5 

R.A.    =  0»45m25s  ) 
Decl.  =  +  33°  14'  \ 

1901.703  68?5  42^73 
.796  68.8  42.51 
.799  69.0  42.53 


68.8 


42.59 


1901.76 

H  gives  65°  ±  :  35"  d=  :  7  .  .  .  16 ;  "  large  star  red." 
The  principal  star  is  not  red  —  yellowish  at  most. 


Weisse 

R.A.    =0h45m56s 
Decl.  =  +  25°     8' 

"Duplex"  in  Weisse.  Not  double  except  as  a 
wide  pair  in  the  finder.  There  are  three  observations 
in  Weisse  differing  slightly  in  place. 


O.Arg.N.901.    8.5  .:.  8.9 

R.A.    =0"50m   3s 
Decl.  =  +59°  41' 


1901.796 
.799 

1901.79 


201?9 
202.8 

202.3 


20.'82 
20.64 


20.73 


"Duplex"  in  O.Arg.  The  only  measures  are  203?2  : 
21 '24  (1892.77)  Espin.  The  components  are  D.M. 
(59°)150  and  149. 


\L  Andromedae.    4  ...  13.5  .  .  .  13.2 

R.A.    =  Oh50m    6s  ) 
Decl.  =  +37°  51'  \ 

AandC(=H1057) 


1901.799 
.818 

1901.80 


1901.818 
.835 

1901.82 


122?  2 
122.3 

122.2 
A  and  B 

310?  8 
311.4 


36  .'87 
36.87 

36.87 


39  .'82 
39.56 


311.1 


39.69 


The  large  star  has  a  proper  motion  of  0'173  in 
73?2. 

1878.67        110?  9        38  .'37        3n        ft 
1878.67        314.4        37.27        3n        ft 


8 


S.    W.    BUBNHAM 


9 


Winnecke.    D.M.(8°)137.    9  ...  9.2 

RA.   =  0h51m46s  > 
Decl.  =  +  8'  38'  \ 

1901.703               128?3                 5-'40 
.760               130.1                 5.41 

H  1079.    44  Ceti.    6  ...  10.5 

RA.    =lh!8m   0s  ) 
Decl.  =  -    8?  38'  \ 

1900.725               298?9               80f37 
.744               298.5               80.37 

1901.73                 129.2                 5.40 
The  only  other  measures  are  : 
1863.86        130?2        5^32        2n        Wn 

H2026.    D.M.(4°)204.    8.6  .  .  .  11 

RA.   =  1"  5">42»  ) 
Decl.  =  +    4°  15'  J 

1900.706               306?6               lO-'ll 
.742               306.0               10.34 
.782               305.6               10.33 

1900.73                 298.7               80.37 
The  only  observations  are  : 
300?5        60'  ±        1828             In        H 
299.6        76.40        1877.86        In        ft 

The  principal  star  has  a  proper  motion  of  0'134  in 
115?4,  which  accounts  for  the  change  in  distance. 

H  638.    11^  ...  115 

RA.   =1"19'»   5s/ 
DecL  =  -    ¥  47'  ) 

1901.760               271?8                 9-52 
.876               271.3                 9.30 

1900.74                 306.1               10.26 

H  gives  303?3  :  10'±  :  10  ...  15  (1830).     The 
principal   star    has  a  considerable    proper  motion, 
0-'214  in  215?1  (Porter)  and  0.'28  in  230?8  (Boss). 
This  would  seem  to  be  common  to  both  stars. 

S  103.    S.D.(2°)192.    8.4  ...  9.7 

RA.   =  Ih10">33'  ) 
Decl.  =  -    2°  10'  J 

1901.703               246?  5                 5  .'49 
.796               246.7                 5.34 

1901.82                 271.5                 9.41 

In  the  field  nf  S.D.(4D)203.    The  only  observation 
is  by  H,  273?0  :  2'-3'  (1820). 

H  640.    S.D.(4C)230.    9^  ...  95 

RA.  =lh27m27s> 
Decl.  =  -    4'     8'  \ 

1901.760               290?  1                 5-  '33 
.876               291.3                 5.29 

1901.75                 246.6                 5.41 

No  recent  measures,  but   probably  unchanged. 
Some  uncertainty  in  place  heretofore. 

H  5453.    D.M.(—  1°)167.    83  ...  9.9 

RA.   =1"  12-"  29s  > 
Decl.  =  -    1°  29'  \ 

1901.703               208?3               27  '56 
.796               208.5               27.35 

1901.81                 290.7                 5.31 
No  other  measures. 

T  Andromedae.    5  ...  10.2 

RA.   =1"33-30I  t 
Decl.  =  +  39°  58'  \ 

1900.684               329?0               52-'53 
.706               329.1               52.73 

1901.75                 208.4               27.45 

The  positions  are  estimated  by  H,  210°  :  30'. 
Engelhardt  gives  209^5  :  27  .'95  (1891.81)  2«.    The 
principal  star  has  a  proper  motion  of  0'499  in  121  ?4, 
and  the  small  star  seems  to  be  moving  with  it. 

Barnard.    D.M.(3  )184.    8.5  ...  11 

R.A.   =  Ih12m40s  ) 
Decl.  =  +4°     1'  ) 

1900.742                12?0                 l-'4o 

Discovered  by  Barnard.     No  change   since  his 
measures  of  1894. 

1900.69                 329.0               52.63 

The  only  other  observations  are  328°4  :  52  '35 
(1880.68)  2«  ft.    The  proper  motion  of  this  star  is 
small,  0^019  in  37?4. 

H  2067.    L  3056.    7^  ...  11.1. 

RA.   =lh33-335? 
Decl.  =  -  18'  24'  \ 

1901.760                 91?3               34-'07 
.87.6                 91.9               33.66 

1901.81                   91.6               33.86 

9 


10 


MEASURES  OF  DOUBLE  STARS 


Probably  without  change.  The  distance  in  H  of 
5"  may  be  a  misprint  for  25".  In  my  measure  of 
1878  the  distance  is  printed  23  '90  instead  of  33  "90. 
The  measures  of  Wilson  (Gin10)  belong  to  H  3455, 
which  is  4m  /  this  pan:. 


H1088.    L3044.    7.0 

R.A.   =l"34m20s 
Decl.  =  +  58°    1 ' 

1900.780  168? 0 

1901.796  167.2 


.9.5 


1901.79  167.6 

H  gives  164?5:  15"  ±  (1828). 

H  3455.    9.1  ...  9.2 


19^52 
19.41 

19.46 


R.A.    =  Ih37" 
Decl.  =  -  18° 


31s 
13' 


1901.760 
.876 

1901.81 


74?  5 
73*.  6 

74.0 


23^56 
23.73 


23.64 


The  components  are  S.D.(18°)291  and  292.    The 
only  measures  are : 

1882.70        73?2        23^90        In        Wilson 

S  168.    8.5  ...  10 

R.A.    =  l»43m    6 
Decl.  =  +  66°     9 

1900.725  224?2  If 73 

1901.796  222.6  1.87 


1901.76  223.4 

No  measures  since  A  in  1867. 


1.80 
No  evidence  of 


change.    H  could  not  see  it,  and  I  failed  with  the 
6-inch  1874. 

Hd  54.    D.M.(1°)335.    8.6  ...  11.2  .  . .  11.2 

R.A.    =  lM4'"26s  ) 
Decl.  =  +    1°  55'  \ 

A  and  B 


1900.706 
.742 

1900.72 


1900.706 
.742 

1900.72 


116.7 


116.9 

AandC 

211?8 

211.1 


4^48 
4.18 

4.33 


15^67 
15.42 


211.4 


15.54 


The  only  other  measures  are  by  the  Harvard 
observers  on  one  night  in  1867.  TEey  give  for  AC, 
213?4  :  14^26  (1867.96). 


S  188  rej.     8.8  ...  9.4 

R.A.    =  I"50m47s  ) 
Decl.  =  +  62°  20'  \ 

1901.722  238? 4  32^54 

.796  238.4  32.62 


1901.76  238.4  32.68 

H    describes    the    components   "  very  red :    fine 
green."    The  colors  are  less  prominent. 


H  1100.    B.A.C.  588.     6.3  ...  10.6 

R.A.    =  lh  50 -a  47s 
Decl.  =  +  64°     3' 

1901.722  310?4  38  .'81 

.796  310.1  38.83 


1901.76 

H  gives  310?4:30" 
error. 


310.2 


38.82 


His  declination  is  20'  in 


H  3476.    L  3731.    6.2  ...  9.8 


R.A.    =  I»54m29s 
Decl.  =  -    9°     6' 


1900.706 
.725 
.742 

1900.72 


193?  0 
193.6 
192.5 


193.0 


62^05 
61.08 
61.77 

61.63 


H  gives  183?7  :  60"  ±.     His  declination  is  l°s  of 
the  real  place.    The  principal  star  is  5.8m  in  S.D. 


H  647.     D.M.(6")319.    8.8  ...  9.3 

R.A.    =  1»56"'16S 
Decl.  -  +    7°     6' 

1900.706  35? 6 

.742  34.3 

.782  35.1 


26 '71 
26.43 
26.60 


1900.74  35.0  26.58 

Positions  estimated  by  H  ;  "  large  star  deep  blood 
red  —  a  very  intense  and  remarkable  color;  small  star 
green."  The  colors  are  very  marked. 


S207.    D.M.(16°)233.    9 

R.A.    =  I"56m45 
Decl.  =  +  17°     4 

1901.873      186? 7 
.876       185.0 


10 


11. '88 
11.96 


1901.87  185.8  11.92 

No  recent  measures,  but  without  change. 


10 


S.    W.    BUBNHAM 


11 


H  2104.    D.M.(52°)500,  501.    8.7  .  .  .  8.8 

RA.   =  1"57">   9s  J 
Decl.  =  +  52'  27'  \ 

1901.722               167?2               30^27 
.758               347.0               30.12 

S219.    8.2...  8.7 

RA.   =2"  3™  11s) 
Decl.  =+32'  48'  \ 

1900.742               183?6               ll-'63 
1901.586               183.9               11.49 

1901.74                 167.1               30.19 

.818               182.3               11.50 

Both  R.A.  and  Decl.  erroneous  in  H.    He  gives 
166?4  :  25'  ±  .    Identified  as  above. 

9  V.  102.    61  Ceti.    6  ...  9 

RA.   =  l"57m39s  ) 
Decl.  =  -    0°  55'  \ 

1900.706               193?  7               43507 
.725               194.2               43.11 

1901.38                 183.3               11.54 
No  recent  measures  ;  apparently  fixed. 

S226.    8.4...  10.2 

RA.    =2"  5-  27*  ) 
Decl.  =  +  23°  24'  \ 

1900.706               249?  5                 2-'40 
.742               246.2                 2.13 
1901.818               241.8                 2.13 
RSFi                  944  S                     1    QC; 

IQfY^   71                         1CX1  rt                     <1A  HQ 

H  in  1873  made  two  measures  of  the  distance, 
34  '50  and  37  '88.    The  only  other  measures  are  my 
own,  193?3  :  42^71  (1877.86).   Bossert  gives  the  proper 
motion  0-144  in  123?7. 

S  211  rej. 

RA.   =i"58»    ±  ) 
Decl.  =  -    6°    0'  \ 

H  could  not  find  anv  pair  in  or  near  this  place 

1901.27                 245.6                 2.15 

No  measures  since  J  ;  little  if  any  change.    The 
Berlin  A.G.  gives  the  proper  motion  of  A,  0'187  in 
126?0,  and  the  small  star  is  therefore  moving  with  it. 

H  1115.    10  Trianguli.    6  ...  12 

RA.   =2hll°59s) 
Decl.  =  +  28°    5'  \ 

1900.742               206?2               57^14 
.744               204.5               57.04 

2  gave  this  as  Class  IV,  8  ...  11.    There  is  no  star 
in  the  assumed  place.    There  is  a  7£m  star  about 
15  's  with  a  distant  9Jm  star  in  the  field,  which  may 
be  the  one  in  question. 

S213.    D.M.(50  >459.    8.4  ...  8.6  ...  12.5 

R.A.   =2"   1-17*  ) 
Decl.  =  +  50"  30'  \               . 

1900.74                 205.3               57.09 

H  gives  206?8:50±',  and  calls  the  small  star 
18m.    No  other  measures. 

S  247  rej.    D.M.(3°)320.    9.0  .  .  .  9.0 

RA.   =2"  12-    7s  ) 
Decl.  =  +    3°  37'  i 

1901.703               211?3                 7.  '61 
.876               212.1                 7.48 

A  and  B 

1900.782               320?6                 1T96 
1901.722                323.6                  1.81 

1901.79                 211.7                 7.54 
The  only  measure  is  : 
1879.66        32?2        7  '39        In        Cin 

1901.25                  321.8                  1.88 

A  and  C 

1900.782                 62?  8                 7'  19 
1901.722                 59.7                 6.88 

H2134 

RA.   =2"  16™   0'  I 
Decl.  =  —  11*  10'  f 

1901.25                  61.2                 7.03 

No  recent  measures  ;  no  sensible  change.    The 
third  star  has  not  been  seen  before. 

Described  by  H,  265?2  :  9'  ±  :  9  .  .  .  10.11.    There 
is  no  pair  of  this  description  in  or  near  this  place. 
It  is  certainly  identical  with  H  2140,  which  is  about 
5m/. 

11 


12 


MEASURES  OF  DOUBLE  STARS 


H  649.    12.5  ...  13 

R.A.    =  2h17m    4s  > 
Decl.  =  +9°     4'  \ 

AandC 

1900.742               242?8               14f26 
1901.760               243.4               14.12 

1901.799                127?  5                 9^10 
H  has  120°  ±  :li'±  :  15  .  .  .  16. 

H2140.    S.D.(11°)459.    8.5  .  .  .  10 

R.A.    =  2h19m59s  ) 
Decl.  =  -  11°  10'  J 

1901.703               263?  4               10r70 
.742                263.1                10.51 

1901.25                 243.1               14.19 
H  gives  19?6  :  10"  ±  and  299°  ±  :  12"  ±. 

O.Arg.N.  3145.    8.4  ...  8.4 

R.A.   =2"38m46'  ) 
Decl.  =  +  49°  37'  \ 

1901.589               143?0                 3^08 
.758               146.5                 3.08 

1901.72                 263.2               10.60 

In  H,  "R.A.  conjectural."     Identified  as  above. 
Identical  with  H  2134,  for  which   H  gives  265?2  : 
9"±  :  9  .  .  .  10-11.     The  R.A.  of  that  star  is  also  in 
error. 

OS(App)27.    7.5...  8.5 

R.A.   =  2"  20™  19s  ) 
Decl.  =  +  10°     2'  \ 

1900.706                 31?  8               73^67 
.725                  31.9                73.79 

1901.67                 144.7                 3.08 

"Duplex"  in  O.Arg.N.     It  is  Hussey  204.     He 
gives  143?4  :  3  '17  (1900.87)  3n.    No  other  measures. 
There  is  a  closer  pair  a  little  following  which  I  noted 
many  years  ago,  and  in  this  connection  measured  it  ; 
155?5  :  1  ^42  (1901.67)  2n.    This  is  Hussey  205.    It  is 
57s/  the  other  pair,  and  3's. 

T  Persei 
R.A.   =  2h45m45'  ) 

1900.71                   31.8               73.73 
The  only  other  measures  are  by  ^,  31?2  :  73'96 

(1875.42). 

Hd  Zones 
Tt  A     —  2*1  29  m    0s) 

Decl.  =  +  52°  16'  \ 
A  and  B 

1900.684                106?3                50-'50 
.687               106.7               51.30 
.725               107.2               51.09 
.742               106.3               50.52 

Decl.  =  +   0°  37'  [ 

In    the    Harvard    Zones  an    8m  star  noted   as 
"double."    The  place  is  that  of  the  9m  star  D.M.(0C) 
431,  but  this  is  not  a  double  of  any  kind.    2  274  is 
4"'  p,  and  possibly  the  note  has  reference  to  that  pair. 

O.Arg.N.  2946 

R.A.    =  2h29m29s  ) 
Decl.  =  +  49°  44'  \ 

"  Duplex  "  in  O.Arg.    Not  double  ;  there  is  a  10m 
star  about  53"  distant.    I  failed  to  find  it  in  1875. 

H  3518.     O.Arg.S.  1715.    8.6  ...  10.5  .  .  .  10.6 

R.A.    =  2"  33™  38s  ) 
Decl.  =  -  28°  41'  $ 

1900.71                 106.6               50.85 
BandC 
1900.742                 81?7                 4^58 

The  faint  star  B  12m  was  first  noted  by  Edgecomb, 
and  in  measuring  that  with  the  18|-inch  the  13m  star 
C  was  added.    My  measures  of  AB  are  106?4  :  50^67 
(1878.46)  2n.    There  is  a  14m  star  from  A  337?3  : 
42^46  (1900.74)  In. 

S  324  rej.    D.M.(46°)658.    6.7'  .  .  .  12.2 

R.A.   =  2»48m27s  ) 
Decl.  =  +46°  41'  \ 

1900.687               203?4               24^94 
.725               203.2               25.10 
.782                203.5                24.81 

A  and  B 

1900.742                 15?2               13^29 
1901.760                 15.5                13.87 

1900.73                 203.4               24.95 

H  gives  191?4  :  12"  ±  for  AB,  and  342?4  :  8"±  for 
AC.     I  could  see  only  the  star  measured,  which  is  B 

1901.25                  15.3               13.58 

of  H.    This  was  rejected  by  2  as  a  close  pair. 

12 


S.    W.    BURNHAM 


13 


H  3543.    Cord.D.M.(29')1096.    10  ...  105  ...  12 

RA.   =  2"  52=  30') 
Decl.  =  -  29°  28'  J 

A  and  B 
1901.876               264?2                 9-89 

$V.  117  =  2359  rej.     7.5  .  .  .  8.5 

RA.   =3"  4'°  17s) 
Decl.  =  +21°  58'  \ 

1900.725               320?5               33'39 
.744               320.2               32.59 

A  and  C 
1901.876                 69?5               14f39 

No  measures  ;  described  in  H,  "  Triple  ;  Cl.  I  and 
II." 

S  334 

RA.   =2"53-    Is) 
Decl.  =  +   6°  10'  j 

1900.666               316?2                 L'45 
.668               317.6                 1.36 

1900.73                 320.3               32.99 

The  only  other  measures  are  by  H  ;  317?5  :  34^80 
(1783.65)  In.     The  principal  star  is  D.M.(21  )418. 
There  is  a  nearer  companion,  13m,  267  ?0  :  14  '69 
(1900.72)  1». 

H  3557.    L  6037.    8  ...  10.9 

RA.   =  3"  9=  12s  ) 
Decl.  =  -  14°  53'  \ 

1900.706                 2?4                 27T13 

1900.67                 316.9                 1.40 

.742                 2.2                 26.77 

H  2170.    -y  Persei.     -  ...  11.2 

RA.   =2"  56"    6s  > 
DecL  =  +  53°     2  •  \ 

1900.684               324?7               57-'56 
.725               325.0               57.43 
.782               324.9               57.32 

1900.72                  2.3                 26.95 

There  is  an  error  of  1°  in  the  Decl.  of  H.    The 
only  observations  are  : 
1835.90        9?9        20'±        In        H 
1880.27        5.3        27.13        3»        ft 

S«I71 

1900.73                 324.9                57.44 

H  gave  the  angle  224?9,  probably  an  error  of  100°. 
The  only  measures  are  323?7  :  57  .'72  (1879.55)  2n  ft. 

RA.   =3"  10-  23s  ) 
Decl.  =  +  46°  35'  \ 

1900.687                 81?7                 3-'56 
.782                 82.8                 3.14 
1901.589                  81.1                  3.51 

O.Arg.N.  3418.    9.0  ...  9.0 

RA.    =  2h57»345  ( 
DecL  =+52'  35'  \ 

1901.835                 90?  1                 4.'09 
.854                 90.0                 4.19 

1900.76                    81.9                 3.40 

From  the  measures  of  J  the  angle  appeared  to  be 
increasing. 

1831.20        74?  7        3.'35        3n        S 
1867.45        81.7        3.32        3»        J 

1901.84                  90.1                 4.14 
'•  Duplex  "  in  O.Arg.    The  only  measures  are  : 
1900.06        90?2        4^50        2»        Espin 

S  353  rej.    D.M.(17  =  )494.    9.6  ...  11.0 

R.A.    =  3h  Om47s  \    ' 
Decl.  =  +  17°  25'  \ 

1901  720                 59°  2               10  '70 

It  would  now  appear  that  S's  angle  was  too  small, 
and  that  the  stars  are  really  fixed. 

H  3570.    7  .    .  12 

RA.   =3"16°>18*) 
Decl.  =  -  20°  45'  i 

1900.706               256?  1               33-'89 
.742               256.0               34.21 

.799                 58.0               10.63 

1900.72                 256.0               34.05 

1901.76                  58.6               10.66 
No  other  observations  except  angle  of  56?4  by  H. 

No  measures  in  H  ;  described  as  "  triple  or  quad- 
ruple."   No  nearer  companion  than  that  measured, 
but  other  small  stars  in  the  field  more  distant. 

13 


14 


MEASURES  OF  DOUBLE  STARS 


H  2187.    S.D.(11°)652.    8  ...  10.7 

R.A.   =  3h17m32s  ) 
Decl.  =    -  11°  47'  \ 

1901.703               240?  7               56  ^(M 
.742                240.2                56.00 

S  416  rej.     D.M.(19°)556.    8.8  ...  9.7 

R.A.    =3h28m    2s  ) 
Decl.  =  +  19°  24'  \ 

1901.720                 56?  6               26^54 
.742                 56.5               26.30 

1901.72                 240.4               56.02 

In  one  observation  H  gives  for  the  angle  239°  5 
(1830),  and  later  325?3  (1835.9).    There  is  probably 
an  error  of  90°  in  the  last.    This  pair  appears  to  be 
S  387  rej.    Hussey  20  is  about  lnl  40"  p,  which  was 
measured  once,  235?4  :  0^24  (1901.74). 

Nova  Persei 

R.A.   =3"  23™    8'  ) 
Decl.  =  +  43'  30'  \ 

Two  of  the  small  stars  in  the  field  were  measured, 

1901.73                  56.5               26.42 

The  principal  star  is  catalogued  as  red.    There  is 
a  11.5m  star,  292?9  :  22  '61,  previously  noted  by  Espin. 

S  457.    D.M.(22°)576 

R.A.   =3"  43"-  15s  ) 
Decl.  =  +  22°  19'  \ 

A  and  B 

1901.815                 99?  5                 1^14 
.818                102.0                  1.19 

and  then  the  work  discontinued,  as  it  appeared  that 
Aitkin  had  carefully  measured  them  all. 

1901.167               63?  4               158^44 
.529                63.0                158.41 

1901.81                 100.7                 1.16 
A  and  C  =  12.6m 
1901.815                340?  5                18^15 

ft1Q                      QQ7    1                      1ft   9J 

1901  35                  63  2                158  42 

1901.167              116?7               102^38 
.529             116.4               101.95 

1901.81                 338.8               18.20 
This  was  observed  for  the  distant  star  which  has 

1901.35                116.5                102.16 

t 

?  IV.  89.    L6436.    8.1  ...9.5 

R.A.    =  3h23m35s  ) 
Decl.  =  +  19°  41'  \ 

1901.742                147?  1                20^35 
.796                146.9                20.27 

not  been  measured  before.  2  mentions  it  as  347°  :  32'. 
There  is  no  change  in  the  close  pair. 

H  666.    L  7069.    6.5  ...  12.7 

R.A.    =3h43"'15s  ) 
Decl.  =  +    9°     3'  \ 

1900.684                 19?2               30^72 

1901.77                  147.0                20.31 

.687                   18.  o                 oU.85 

Porter  gives  the  proper  motion  of  A,  0'203  in 
108?0.   The  components  seem  to  be  moving  together. 

1783.73        152?0        20^05        In        H 
1879.66        147.3        20.40        In        Cm 

S  417  rej.     S.D.(3°)572.    8.5  ...  9.6 

R.A.    =  3"27">27S  ) 
Decl.  =  -    2°  57'  \ 

1900.68                    18.7                30.78 

No  other  measures.     H  gives  25°  ±  :  25"  ±6  .  .  . 
17-18. 

H  667.     10.5  .  .  .  12.7 

R.A.    =3"  44  "'15'  ) 
Decl.  =  -    0°  33'  J 

1901.703                 89?  7               12^64 
.758                  91.1                12.38 

1901.703                179°  5                25-78 
.742                179.8                25.78 

1901.73                  90.4               12.52 

1901.72                  179.6                25.78 
The  only  other  position  is  178?3  :  25"  ±  (1830)  H. 

H  gives  90"  ±  :  4"-5"  AB,  and  300°  ±  :  15"  AC, 
with  magnitudes  9,  12,  and  18.     I  did  not  see  the 
third  star.    Not  in  S.D. 

14 


S.    W.    BUBNHAM 


15 


H668.    D.M.(-0°)608.    8.5  ...  10.5 

1901.854               357.2               58.96 

RA.    =  3h44m44s  ) 
Decl.  =,-    0'  32'  ( 

1901.703               299?0               2T67 
.758               298.1               21.23 

1901.07                 357.2               59.02 

The  only  measures  are  by  J  in  1875.    There  is  no 
change. 

1901.73                 298.5               21.50, 
Only  H,  315°-  :  18'±  :  8  .  .  .  12. 

H3601.    Cord.D.M.(23')1600.    12  .  .  .  9.5 
RJL   -3h46m31'  ) 

H  3608.     -y  Eridani.    3}  ...  13.2 

RA,   =  3h52»>24s  ) 
Decl.  =  -  13°  51'  \ 

1900.706               241?7               52-'68 
.742               241.5               52.80 

Decl.  =  -  23°  18'  \ 

1901.760               300?4               10^62 
.796               299.6               10.54 

1900.72                 241.6               52.74 

The  only  other  complete  measures  are  my  own, 
238?4  :  51  -'93  (1877.88)  2n.    The  change  in  angle  is 

1901.78                 300.0               10.58 

H  found  303?5  :  15'±  :  8J  .  .  .  10.    No.  33  of  the 
Lowell  Catalogue  could  not  be  found  by  Cogshall. 
It  is  evidently  identical  with  H  3601,  See  having  an 
error  of  1°  in  his  Decl.    His  measures  were  299?2  : 
10-'73:7  ...10.8(1897.72). 

S  462.    i.ti  .  .  .  10 

RA.    =  3"  46-  42') 
DecL  =  +  52°    1'  J 

1901.720               317?7                 8^20 
.742               320.7                 8.03 

due  to  the  proper  motion  of  A,  0'114  in  158?3. 

o.  N.  93 

RA.    =3"57'»±         ) 
Decl.  =+23°     6'iJ 

No  measures  in  Tf.  ;  given  as  Class  II  ;   "  place 
extremely  precarious."    The  place  agrees  with  D.M. 
(22*)626,  but  that  is  not  double,  and  has  no  faint  star 
near  it.    The  pair  in  question  is  probably  identical 
with  2  479. 

1901.73                 319.2                 8.11 

No  recent  measures,  but  unchanged.  Not  in  D.M., 
but  near  D.M.(51=)804. 

43  Persei     S  440  ~  Tl  V  41 

H  2220.    D.M.(56°)885.    8  ...  11.5 

RA.    =3h59m49'  ) 

Decl.  =  -f  56°     7'  \ 

1900.744               296?6               25^63 
.763                296.5                25.97 

RA.    =3h47-41s  ) 
Decl.  =  +  50°  21'  \ 

1901.720                 30?  4               75  .'47 
.742                  29.9                75.27 
.758                 30.1               75.36 

1900.75                 296.5               25.80 
H  gives  296?4  :  14'±  :  9  .  .  .  14  (1830). 

S  492  rej.    6.6  ...  10  ...  10 

1901.74                   30.1                75.37 

The  principal  star  has  a  proper  motion  of  0'155 
in  147  '6,  which  also  belongs  to  the  9.5  companion. 

1863.07        29?7        Io'l5        4«        OS 
1888.19        30.0        75.34        2n        Engelhardt 

RA.    =  4"  Om    6s  t 
Decl.  =  +  41°  10'  \ 

AandB 

1900.687               202?5               94  -'47 
.744               202.2               94.31 

There  is  a  12.5m  star  nearer  than  this  in  279°. 

OS  (App)  41.     7  ...  8.5 

RA.   =3h48'»   6s  > 
Decl.  —  +    4=  49    \ 

1900.71                 202.3               94.39 
BandC 

1900.687               135?  7                 5  '47 
.744                135.7                  5.74 

1900.684               357?0               58-'72 
.687                357.3                59.37 

1900.71                 135.7                 5.60 
In  2  Classes  I  and  VI.    No  other  measures. 

15 


16 


MEASUEES  OF  DOUBLE  STABS 


Hd  66.    S.D.(16°)783.    9.6  ...  9.6 

R.A.  =4"  1">32'  ) 
Decl.  =  -  16°  10'  J 

1901.760                 83?  8               17?  73 
.796                 83.1               17.75 

02  (App)  49.    7.5  ...  7.5 

R.A.   =  4h12m41s  ) 
Decl.  =  +    1°  29'  \ 

1901.742               144?6             102^80 
.758               144.8    •          102.79 

No 
and 

1901.78                   83.4               17.74 

• 

Given  in  the  Harvard  Annals  with  rough  place, 
and  261?7  :  18  '52  :  9.3  ...  9.5  (1868.48)  3n.    There  is 
a  15m  star  nearer  A,  263?4  :  5?68  (1901.79)  In. 

OS  73.    (i  Persei 

R.A.    =  4"   6m    5s  | 
Decl.  =  +  48°     6'  \ 

A  and  B 

1901.720               349?  8               14^52 
.722               348.5               14.24 

1901.75                 144.7             102.79 

Fixed;   A  gives  144?9:  102^94  (1875.33)  3n. 
other  measures.    These  stars  are  Lalande  8090 
8093. 

S  537.    8.5  ...  9.7 

R.A.    =4>>16m215  ) 
Decl.  =  -  10°  14'  J 

1900.706               341?5               16^36 
.742               341.6               16.49 

1900.72                 341.5               16.42 
Distance  and  angle  slowly  increasing. 

1832.39        334?0        14?99        4?i        2 
1867.10        336.9        15.28        3n        A 
1891.86        340.4        15.98        In        ft 

P402 

R.A.    =4"  17™    3=  \ 
Decl.  =          1°  S3'  \ 

1901.760                 75?3                 7^53 
.796                  73.7                  7.52 

1901.72     .           349.1               14.38 
A  and  C  (=  H  VI  20  =  Sh  364) 

1901.720               231?  9               84^02 
.722               231.6               84.30 

1901.72                 231.7               84.16 

No  change  in  B.    For  AC  Sh  found  231?7  :  91-56 
(1822.85)  2n.    There  is  a  12.8m  star  nearer  than  C, 
124?2  :  5(K36  (1901.72)  In. 

H  673.    D.M.(30°)641.    9.2  ...  9.6 

R.A.    =  4"   9™  25s  > 
Decl.  =  +  30°  30'  \ 

1901.799               195?  5               2K40 
.818               195.8               21.09 

1901.78                   74.5                 7.52 

This  was  put  on  the  list  in  order  to  observe  a 
third  faint  star  noted   by  Cogshall  at  110°  :  7  '8, 
referred  to  in  my  General  Catalogue.    I  found  a  14m 
star  111?1  :  29'0.    Since  then  I  have  learned  from 
him  that  there  was  an  error  in  transcribing  the  dis- 
tance, which  was  really  29",  as  I  found  it. 

S  530.    D.M.(53°)769 

R.A.    =4"  17'"    5s  ) 
Decl.  =  +53°  13'  \ 

A  and  B 

1901.720               200?  5               14fl2 
.722               200.7               14.19 
.742               199.2               14.06 

1901.81                 195.6               21.19 

H  gives  210°  ±  :  18'  ±  :  7  ...  10.    I  found  many 
years  ago  that  there  was  an  error  in  H's  magnitude 
of  A.    This  is  given  as  9.2  in  D.M. 

S  519  rej.    D.M.(50°)976.     7.7  ...  95 

R.A.   =  4"llm52s  ) 
Decl.  =  +50°     5'  \ 

1900.744               346?4               18^29 
.763                345.8                17.98 

1901.73                 200.1               14.12 
AandC 

1901.742                279?  6                36^81 
.758                280.3                36.83 

1900.75                 346.1               18.13 

Given  as  Class  IV  in  2.    The  only  other  measures 
are  by  Espin,  346?8  :  18fBO  (1892.%)  2n. 

1901.75                 279.9               36.82 

16 


S.    W.    BUKNHAM 


17 


C  and  D  (new).    11.8  ...  12.0 
1901.742                 43?2                 1'39 
.758                  44.4                  1.55 

57  Persei.    Sh  44  =  Jf  VI.  99 

R.A.   =  4»24m58s  ) 
Decl.  =  +  42°  48'  ) 

1901.75                  43.8                 1.47 

No  other  measures  of  C,  but  it  was  noted  by  H  in 
his  Fifth  Catalogue.    This  star  I   found  to  be  a 

1900.687               198?  8             115^38 
.744               198.4             114.83 
.763               198.6             115.46 

rather  difficult  pair.    The  only  measures  of  AB  since 
S  are  by  Ma  and  J.    There  is  no  change. 

H  342  =  ?  IV.  117  =  S  539  rej.    8.2  ...  10.2  .  .  .  12.5 

R.A.    =  4"  17'"  19s  { 
Decl.  =  -    5°  17'  J 

A  and  B 

1901.706               234?8               17?69 
.742               235.2               17.35 

1900.73                 198.6             115.22 

The  change  is  due  to  proper  motion,  probably  of 
the  smaller  star.    This  is  given  in  the  A.G.  as  0'076 
in  157?7. 

1821.91        198?9        110^19        In        Sh 
1875.11        198.9        113.68        2n        A 

This  change  in  distance  corresponds  to  the  move- 
ment as  given  of  B. 

• 

1901.72                 235.0               17.52 
AandC 

1901.706                 82?  5               28f27 
.742                 81.8               28.18 

H  3653.    O.Arg.S.  3129  and  3130.    8.3  ...  8.5 

R.A.   =4"  25-°    7s) 
Decl.  =  -  16°  43'  ( 

1900.742               156?3               42'58 

1901.72                   82.1               28.22 

1901.758               157.4               42.42 

H    gave   238?2  :  19-53  (1783.13)  In.     No  other 
measures  since,  except  my  own  in  1877,  which  show 
no  change  as  compared  with  the  above. 

S  541  rej.    9.2  ...  9.3 

R.A.   =  4h18-14s  ) 
Decl.  =  +  21°  58'  \ 

1900.725               331?  8                 5^22 
.744                328.3                  5.83 
.780                329.5                  5.37 

1901.75                 156.8               42.50 

The  only  other  measures  are  148?5  :  40'  ±  (1835.9) 
H.    The  O.Arg.  places  give  155?9  :  48^87  (1850±). 

Hd  Zones.    10.7  ...  12 

R.A.    =4"26mll') 
Decl.  =  +    1°    2'  \ 

1900.742               235?8                 1^93 
1901.796               239.2                 2.42 

1900.75                 329.9                 5.47 

This  is  the  faint  pair  between  «'  and  <r  Tauri. 
The  only  other    measures    are    by   J,  327  ?2  :  4  '94 
(1874.11)  4w. 

S  547.    8.5  ...  10.4 

R.A.    =4"  19-  48s  > 
Decl.  =  -    1°  40'  J 

1901.758                 43?  9                 2.  '04 
.796                 44.5                 1.98 

1901.77                 237.5                 2.17 

Marked  "  elongated  "  in  the  Harvard  Zones.    No 
other  observations. 

8  451  =  OS  (App)  51.    75  ...  7.7 

R.A.    =4h27m25s  ) 
Decl.  =  +47°     T\ 

1900.687               198?4               58^68 
.744               198.1               58.62 

1901.78                  44.2                 2.01 

The  change  in  angle  is  about  60°  since  1831.     A 
comparison  of  these  measures  with  2's  gives  OT052  in 
the  direction  of  316?1  for  the  proper  motion  of  A. 

1900.71                 198.2               58.65 
Probably  unchanged. 

1875.13        197?4        59^27        2n        J 
1875.3          198.4        59.44                   A.G. 

17 


18 


MEASURES  OF  DOUBLE  STARS 


H  344.    D.M.(33°)883.    8.4  ...  11 

R.A.   =  4h28m26s  ) 
Decl.  =  +33°  41'  \ 

1900.744  102?0  11^20 

.780  102.4  11.14 


1900.76 


102.2 


11.17 


The  only  observations  are  by  H,  95°  ±  :  10"  ±  :  10 
.14.     There  is  a  14m  star  82?2 :  17 '5. 


S565 

R.A.   =4" 29™  42s 
Decl.  =  +  41°  53' 

1900.780  174? 3 

.782  173.3 


1900.78 


173.8 


If  63 

1.48 

1.55 


Probably  fixed.      Measured    in   looking   for  the 
Weisse  pair  given  below. 

P  1043.    3  Camelopardali 

R.A.    =4"30m28s  ) 
Decl.  =  +52°  50'  \ 


1900.687 
.780 
.782 

1901.796 
.815 
.818 

1901.28 


299?  1 
295.8 
292.6 
294.3 
297.2 
295.2 

295.7 


3^66 
3.73 
3.74 
3.55 
3.88 
3.83 

3.73 


Weisse  IV.  647.    9  ...  9.1 

R.A.    =4h31m42s 
Decl.  =  +  42°     6' 

1901.720      110? 3       2^46 
.722      113.8       2.44 


1901.72 


112.0 


2.45 


Weisse  IV.  643  is  noted  "duplex  3"  "  in  that  cata- 
logue. That  star  is  not  double,  and  the  note  doubt- 
less belongs  to  the  one  given  here,  which  is  about 
5's.  No  other  measures. 


H  346     B.A.C  1444.    6.1  ...  11.0 

R.A.    =  4»33m49s  ) 
Decl.  =  +28°  23'  \ 


1901.742 

.758 


1901.75 


54?  5 
54.7 

54.6 


43f37 
43.27 

43.32 


No  other  measures  ;  only  estimates  by  H. 


S  579.    8.6  ...  9.7 

R.A.   =  4h34m32s  ) 
Decl.  =  +22°  30'  J 

1901.758       34? 5 
.799       34.7 


1901.78 


34.6 


16^31 
16.43 

16.37 


No  recent  measures.    No  material  change. 


S  455.    r  Tauri 

•       R.A.   =  4h35ra    2 
Decl.  =  +  22°  44 

1900.684      213^2 
.687       213.1 


•\ 


1900.68 


213.1 


63^02 
62.94 

62.98 


Without  change.  A  gives  212?4  :  62^85  (1875.35) 
2n.  Large  star  supposed  to  be  a  close  pair  from  an 
occultation  observed  by  Hough  (A.J.  474).  Condi- 
tions too  unfavorable  at  the  time  of  my  measures  to 
detect  a  very  close  pair. 

S  585.    D.M.(4°)733.    8.6  ...  10.5 

R.A.   =4"  36-°  21" 
Decl.  =  +    4°  29' 

1900.706  275?  7  1U85 

.742  275.9  12.05 


1900.72 


275.8 


11.95 


No  recent  measures,  but  unchanged.  Place  here- 
tofore approximate  ;  identified  as  above.  The  mag- 
nitude of  A  in  D.M.  is  9.2  ;  S  gives  8.3. 


Hall.    D.M.(1°)809.    9.1  ...  9.1 

R.A.   =  4"  3 
Decl.  = 


57-°  53s  ) 

1°  51'  f 


1901.742 
.758 
.760 

1901.75 


157?3 
155.8 
156.1 


156.4 


2^35 
2.37 
2.53 

2.42 


Identified  as  above.    The  only  other  measures  are 
by  Hall,  157?4  :  2^29  (1888.10)  Sn. 

D.M.(21°)694.    9.1  ...  10.5 

R.A.    =  4  h  38  m  51  • 
Decl.  =  +21°     3' 


1901.758 
.799 

1901.78 


114?  7 
113.8 

114.2 


5^44 
5.37 

5.40 


18 


S.    W.    BURXHAM 


19 


This  was  measured  in  trying  to  find  S  593  re/., 
which  should  be  about  lm/and  10°  11.    S  gave  Class 
IV  and  magnitudes  8.9  ...  8.9.    There  is  no  such 
star  in  this  place.    The  8m  star  some  distance  sf  has 
a  very  distant  llm  star  in  103°,  but  neither  that  nor 
the  one  measured  is  likely  to  be  the  S  star. 

H  350.    11  ...  11 

RA.   =4"43»18') 
DecL  =  -f  34    35'  \ 

1901.799               308?3                 5-'32 
.818               308.2                 4.96 

H  689.    L  9355.    7.5  ...  113 

RA.   =  4h52m   8s  / 
Decl.  =  -    2°  24'  \ 

1901.758               277?6               20'76 
.760               279.3               21.18 

1901.76                 278.4               20.97 

The  only  other  measures  are  275?6  :  20^67  (1880.63) 
2n  /». 

W1  IV.  1215.    9  ...  9 

RA.   =41>56-   5s  > 
Decl.  =  +  13°  11'  \ 

1900.744                 83?0                 4-'38 
.763                 84.0                 4.39 

1900.81                 308.2                 5.14 

H  describes  it  as  "  extremely  delicate  and  beauti- 
ful," and  gives  310°-*-  :  2"-+-.    It  is  in  the  field  with 

D.M.(34°)914. 

9  VI  83.     D.M.(6°)765.    7  ...  85 

RA.   =4h44->12») 
Decl.  =  +    6>  37'  \ 

1900.684                  4?1               96^08 
.742                  3.7               95.78 

1900.75                   83.5                 4.38 

"  Duplex  "  in  Weisse.    The  only  other  measures 
are  in  Leipsic  A.G.,  p.  207,  82?2  :  4-'59  (1893.79)  In. 

H  2247.    S.D.(5°)1135.    8.5  ...  11.9 

RA.   =4"56'»515) 
Decl.  =  -    5'  53'  J 

A  and  B 

1901.758                 58?  2               20-'91 
.796                 55.7               20.67 

1900.71                    3.9               95.93 

The    only  other    measure  is    by   Tj.,   1°1  :  80  '97 
(1783.79)  In. 

S  457.    8.3  ...  83 

RA.    =4h46m59») 
Decl.  =  -    1°  28'  £ 

1900.763               354?  5               41  .'03 
.780               354.5               41.01 
1901.758               354.6               40.96 

1901.77                    57.0                20.79 
A  and  C 

1901.758                 18?7               33-'18 
.796                 17.1               33.42 

1901.77                   17.9               33.30 
C  and  D  (11.6  .  .  .  13) 

1901.758               313?5                 2-'67 
.796               315.2                 3.26 

1901.10                 354.5               41.00 

No  other  measures  except  S,  353?7  :  41  .'49  (1824.42) 
3)i.    These  stars  are  D.M.(-1°)744  and  743. 

H  3705.    O.Arg.S.  3514.    7.7  ...  10.5 

R.A.    =4h51°'24s  > 
Decl.  =  -  16°  19'  \" 

1901.758                141?  7                22  .'62 
.796               140.8               22.14 

1901.77                 314.3                 2.96 

No  other  measures.    H  gives  55?6  for  AB.    The 
closer  star  is  new. 

OS  94  rej.    O.Arg.N.  5495.    7.5  ...  11  ...  113 

RA.   =  4"58m    7s  ) 
Decl.  =  +  50°    8'  i 

A  and  B 

1900.744               304?  3               17-'90 
.763               301.0               18.17 

1901.78                  141.2                22.38 
The  only  other  measures  are  : 

IQQ^    Q             1QQ°Q             1fi"-i-             IM             TT 

1880.4        141.0        22?29        3n        ft 

1900.75                 304.1               18.03 

19 


20 


MEASURES  OF  DOUBLE  STARS 


1900.744 
.763 


AandC 
63?  7 
62.6 


25^14 
24.95 


1900.75  63.1  25.04 

There  is  a  14m  star  from  A,  340?9  :  26^1. 


S640.    (=H356) 

R.A.    =  4h59"'lls  ) 
Decl.  =  +  33°  15'  \ 

A  and  B 

1900.725  96? 9 

.763  96.3 


1900.74  96.6 

A  and  C  (C  =  llm) 
1900.725  315? 6 


.763 


1900.74 


317.0 
316.3 


9 '52 
9.44 

9.48 


25^26 
25.30 

25.28 


C  not  in  S  ;  first  noted  by  H  ;  not  measured  be- 
fore. No  recent  measures  of  AB,  but  without  change. 


S  466  (=H  VI.  105).    105  Tauri 

R.A.    =  5"   Om  45'  ) 
Decl.  =  +21°  33'  \ 

1900.725      250? 8      111 f 45 
.763      250.3      111.29 


1900.74       250.5      111.37 

Both  stars   have  meridian  positions.    No  meas- 
ures except  S. 

1825.04        251?0        109^99        2n  S 
1825±          251.2        116.33        Weisse 
1875±          250.7        110.44        A.G.Berlin 

The  proper  motion  of  A  is  very  small,  0'025  in 
276?8. 

Edgcomb.    103  Tauri.    6  ...  13 

R.A.    =5h   0™48S 
Decl.  =  +  24°     6' 

A  and  B 


147?0 
152.3 


1900.725 
.763 

1900.74  149.6 

AandC(=H  V.  114) 
1900.725  198?0 

.763  197.4 


13^02 
13.57 

13.30 


35f52 
35.50 


1900.74 


197.7 


35.51 


The  faint  star  B  was  detected  by  Edgcomb  in 
1878.  The  only  measures  are  147?9  : 12T94  (1878.98) 
In  ft;  and  for  the  other,  197?6 :  30^05  (1783.80)  In 
by?- 

S  642  rej.    66  Eridani.    6  ...  9.7 


R.A.    =  5h   0 
Decl.  =  —    4° 


49' 


1900.763 
.780 

1900.77 


9?  3 
10.0 

9.6 


52^85 
52.77 

52.81 


The  only  other  measures  are  my  own,  9?4  :  52  '50 
(1879.95)  In. 


S  468  (=  S  650  rej.). 

R.A.    =  5h   3m27 
Decl.  -  +  13°  51 

1900.744      165?4 
.763      165.8 


8  ...  8.1 


1900.75 


165.6 


26^25 
26.45 

26.35 


No  measures  since  South,  162?6  :  27 '18  (1825.00) 
2n.    The  A.G.  positions  give  164?4  :  26^68. 


R.A.   =  5" 
Decl. 


OS  517 

.    =  5"   7m  18s  ) 
:1.  =  +    1°  49'  \ 

A  and  B 
1900.780  308^9 

AB  and  C  (C  =  12.2) 

1900.780      137?3 
1901.815       139.2 


6^88 
6.72 


1901.30  138.2  6.80 

The  faint  star  discovered  by  Hall.    Unchanged. 

OS  102 

R.A.   =  5h   7-"  18s  ) 
Decl.  =  +    0°  25'  i 

Certainly  round,  with  all  powers,  with  good  con- 
ditions 1900.78.  It  has  not  been  seen  otherwise  in 
the  last  thirty  years.  It  is  probably  not  a  double 
star. 


W2V.  199  =  D.M.(31°)913 

R.A.    =5"   9™  31s 
Decl.  =  +  31°     8° 

Noted  as  "  duplex  "  in  Weisse.  It  is  not  a  double 
star  of  any  kind  (1901.79).  There  is  a  4"  pair  of  12m 
stars  in  the  field. 


20 


S.    W.    BUBNHAM 


21 


X  Aurigae.    AD  =  H  V.  22- 

R.A.    =5"  10-  42s  ) 
Decl.  =  +39°  59'  \ 

A  and  B  (B  =  135) 
1900.780               273?4               28.'92 
.782               275.4               29.30 

H  3272.    8  ...  11.5  ...  11 

R.A.   =5"  11"  48s  I 
Decl.  =  +  39°  14'  \ 

A  and  B 

1900.782               342?  1 
1901.720               342.0 

.1 

19^40 
19.48 

1900.78                 274.4               29.11 
A  and  C  (C  =  12.2) 

1900.780               224?4               33^57 
.782               225.0               34.09 
1901.586               225.5               33.83 

1901.25                 342.0 
A  and  C 

1900.782               295?5 
1901.720               295.0 

19.44 

29'26 
29.06 

1901.25                 295.2 
A  and  D 

1900.782                 42?4 
1901.605                 42.5 
.720                 41.9 

29.16 

33  '13 
33.71 
33.25 

1901.05                 225.0               33.83 
A  and  D  (=23App  II) 

1900.780                 7?2               133'64 
.782                 7.2               133.38 

1900.78                   7.2               133.51 

The  nearest  star  has  not  been  seen  before.    C  was 
added  by  me  with  the  l&|-in.    The  measures  now 
show  that  this  star  is  not  moving  with  A;  the  only 
measures   are    197?6  :  40  M7  (1879.28)    2»  ft.     The 
change  is  due  to  the  proper  motion  of  A,  as  is  that 
in  the  old  companion  D.  The  large  star  has  a  proper 
motion  of  0-'838  in  141?9.     A  comparison  of  my 
measures  with  those  of  S  in  1836  gives  0'856  in  140?6. 

9  V.  88.    D.M.(39°)1250.    9  ...  10 
R.A.    -5h10m46s  ) 

1901.40                   42.3               33.36 

The  only  measures  are  mine  of  1879,  which  show 
no  change. 

Aitken  53.    S.D.(3°)1061.    8.3  ...  11.2 

R.A.    =5h13m   6s  ) 
Decl.  =  -    3'  12'  \ 

1900.742                 48?3                 5-'13 
.763                 47.2                 5.13 
1901.873                 46.9                 4.96 

Decl.  =  +  40°    0°  \ 

1900.782               217?8               32-'43 
1901.586               217.3               32.46 

1901.12                  47.5 

This  star  has  a  large  proper  motion 
and  the  companion  is  moving  with  it. 

H  697.    B.A.C.  1657.    6.8  .  . 

R.A.   =5"  15"  24s  I 
Decl.  =  -    0°  32'  \ 

A  and  B 

1900.763                 59?  8 
1901.838                 59.8 

5.07 
0-'690  in  77?5, 

.11.7 

33  '06 
33.10 

1901.18                 217.5               32.44 

Near  X  Auriga?.     No  measures  since  9,  215?9  : 
35'25  Q783.49)  In.  There  are  two  faint  stars  between. 

W-  V.  269.    8.9  ...  9.0 

R.A.   =5"  11™  43s) 
Decl.  =  +36"    5'  \ 

A  and  B 

1900.782               329?8                 2^85 
1901.722               329.6                 2.81 

1901.30                  59.8 
A  and  C  (C  =  11.2) 

1900.763                110?  8 
1901.838               112.2 

33.08 

38^60 

38.28* 

1901.25                 329.7                 2.83 
A  and  C  (C  =  13.5) 

1900.782                224?0                  9  '88 
1901.722               225.3               10.36 

1901.30                 111-5 
The  only  other  measures  are  : 

1878.99          59?  8        32  -'40 
1878.99        109.8        36.81 

38.44 

In        P 
In        ft 

1901.25                 224.8               10.12 
Noted  in  Weisse  "duplex  3"."   No  other  measures. 

21 


22 


MEASURES  OF  DOUBLE  STARS 


There  is  no  error  in  reducing  the  last  distance, 
but  it  seems  unlikely  that  the  faint  star  should  have 
any  such  motion.    The  proper  motion  of  A  is  very 
small,  0?017  in  339?4. 

Madler      SDf7°Yl050     92         92 

S  484.    D.M.(33°)1064.    8.4  ...  8.4 

R.A.   =  5h21m46s  ) 
Decl.  =  +33°   21'  \ 

1900.744               169?9               58^90 
.763               170.0               59.08 
1901.815               170.2               59.03 

R.A.    =  5h15m32s  ) 
Decl.  =  -    7°    0'  J 

1901.760               159?  3                 3^09 
.796               159.5                 3.13 

1901.11                 170.0               59.00 
No  measures  since  South  : 
1825.12        170?0        58^95        2n 

1901.78                 159.4                 3.11 

The  only  other  measures  since  Ma  in  1843  are 
mine  of  1877.    There  appears  to  be  no  change. 

H  701.    D.M.(31°)992.    7.2  .  .    10.9 

R.A.    =5"  22™  50s  ) 
Decl.  =  +31°  25'  \ 

1901.796               137?3               35^40 
.799               136.8               35.13 

9  V.  68.    L  10165.    7.7  ...  8.5 

R.A.    =  5h19m   0s  | 
Decl.  =  -    2°  57'  S 
1901.854               281?8             135^61 
.873               281.8             136.31 

1901.79                 137.0               35.26 

H  has  no  estimates  of  angle  and  distance  ;  "  large 
star  very  red,"  and  magnitudes  9  ...  15.     It  is  7.1m 
in  D.M.    Other  distant  companions  ;  only  reddish. 
This  is  in  his  place. 

1901.86                 281.8             135.96 
Except  an  angle  in  Cin6,  the  only  measures  are  : 
1783.76        277?9        120^18        In        H 

S  483.    L  10164.    7.4  ...  8.5 

Webb.    S.D.(4°)1146  and  1145 

R.A.   =  5h23m    5s  ) 
Decl.  =  -    4°  47'  \ 

1901.796               228?  2               46^94 
.815               229.0               46.81 

R.A.    _  5h20m    9s  ) 
Decl.  =  +33°  41'  \ 

1900.744                 51?2               95^18 
.763                 50.9               95.32 
1901.815                 50.9               95.46 

1901.80                 228.6               46.87 

A  is  variable,  discovered  by  Webb  in  1874.    The 
only  other  measures  are  227?4  :  46-'70  (1879.14)  2n  ft. 

1901.11                   51.0               95.32 

South  made  the  distance  87  '6  in  1825.    The  only 
other  measures  since  are  Engelhardt  in  1891.    The 
change  seems  to  correspond  to  the  proper  motion  of 
A,  OM71  in  180?0. 

9  V.  101.    7  ...  10 

R.A.    =5h23m37s  ) 
Decl.  =  -    7°  21'  J 

1900.763               116?6               47^90 
1901.815               117.6               48.42 
.838                117.2                48.47 

S713.    D.M.(6")928 

R.A.   =5"  20-  45s  ) 
Decl.  =  +    6°  52'  \ 

•1901.838                 30?4                 2^88 
.873                 30.9                 3.23 

1901.41                  117.1                48.26 
The  only  measures  are  by  ?  in  1783,  105?  ±  :  44  T25. 

Hd  69.    S.D.(22°)1125.    9  ...  12.2 
R.A.    =5"  23™  57s  ) 

1901.85                  30.6                 3.05 

No  measures  since  A,  but  without  change.    It  was 
observed  more  particularly,  to  identify  the  star,  and 

Decl.  =  -  22°  43'  \ 

1901.815                  44?  6                12^56 
2.145                  42.9                12.90 

get  the  correct  place. 

1901.98                   43.7               12.73 

22 


S.    W.    BURXHAM 


23 


No  measures  at   Harvard.    Identified,  and  cor- 
rected place  given  here.    Hd  71,  which  is  given  as 
2™/  and  2's,  is  the  same-  pair  measured  above. 

Sh  61.    D.M.(2°)986.    8.1  ...  8.5 

S  490.    8.2  ...  8.7 

RA.   =5h29m38s  / 
Decl.  =  -    5°  30'  j 

1900.763               214?5               78^20 
.780               214.6               78.05 

R.A.    =5h25m255  > 
Decl.  =  +    2°  44'  \ 

1901.815               352?  5               66?90 
.838               353.1               67.27 

1900.77                 214.5               78.12 
The  only  measures  are  by  South  : 
1825.21        214?5        77^68        2n 

1901.82                 352.8               67.08 

The  only  other  measures  since  1822  are  mine  in 
1879.    There  is  no  change.    The  A.G.  positions  give 
352?4:  68^09  (1881). 

Engelmann.    S.D.(6°)1212  and  1211.    8.6  ...  8.9 

W  V.  735.    8.5  ...  9.8 

R.A.    =5*30-  39*) 
Decl.  =  -  13"  54'  ) 

1901.838               151?5               44-'20 
1902.145               151.9               44.32 

R.A.    =5"  26-  28s  ( 
Decl.  =  -    6"  29'  \ 

1901.838               251?3               44  .'87 
.873               251.2               44.88 

1901.99                 151.7               44.26 

Marked   "duplex"    in   Weisse.     It  is  given  by 
Schjellerup  in  his  list  of  doubles,  and  estimated  140?  : 
15'  :  8.5  ...  9.5.    These  two  stars  are  S  D  (133)1192 

1901.85                 251.2               44.87 

The  onlv  measures  are  by  Engelmann,  251?  4  : 
44^58  (1863.10)  5«. 

S  735.    8.4  ...  8.7 

RA.    =  5h27™    2s  ) 
Decl.  =  -    6°  35'  } 

1901.815               352?  2               41  .'64 
2.145               351.6               41.50 

and  1193,  the  latter  being  1  :5/  and  0'2n  of  the  other. 
There  would  seem  to  be  no  question  of  considerable 
change.    The  meridian  positions  of  A  do  not  indi- 
cate any  certain  proper  motion.     The  movement  is 
probably  in  the  small  star. 

H  3277.    D.M.(17')972.    8.8  ...  13 

R.A.    =5»32m23s  ) 
Decl.  =  +  17°  41'  \ 

1901.98                 351.9               41.57 
The  change  is  due  to  proper  motion. 

1900.744                 69?  1               23-'20 
.763                 70.5               22.95 

1831.15        355?2        30^90        In        2 

These  measures  give  for  the  proper  motion  of  A, 
assuming  the  companion  to  be  fixed,  0'151  in  the 
direction  of  162?4. 

9V.  118.    D.M.(-1°)949.    7.1...  10.7 

R.A.    =  5h27"'58s  ) 
Decl.  =  -    1°    7'  \ 

1901.796               263?  6               27^58 
.815                263.5                27.50 

1900.75                  69.8               23.07 

I  could  not  see  the  companion  with  the  6-in.  in 
1876.    H  gave  73?5  :  20±  (1831).    It  is  near  2  759. 

W2  V.  1005.    9  ...  9 

R.A.   =5h34»   35) 
Decl.  =  +40'  49'  \ 

1901.758                 18?4               20-'99 
.799                 17.5               20.97 

1901.80                 263.5                27.54 

?  has  only  the  angle  256?9  in  1783,  and  there  are 
no  other  measures  since. 

1901.78                   17.9               20.98 

"Duplex"  in  Weisse.    No  other  measures.    The 
components  are  D.M.(40°)1383  and  1384. 

23 


MEASURES  OP  DOUBLE  STARS 


S  771.    D.M.(19°)1026.    9.0  ...  9.2 

R.A.   =  5h34m42s 
Decl.  =  +  19°  29' 

1901.838  55?2  24^29 

.876  55.3  24.00 


1901.85  55.2  24.14 

The  motion  is  rectilinear.     It  was  put  on  the  list 
more  particularly  for  identification.     In  looking  for 
this,  a  similar  pair  7  '  n  and  48/  was  measured  : 
1901.85        342?5        29^25        8.9  ...  10.4        2n 

This  is  D.M.(19°)1027. 


29  Camelop.    $  IV.  125  =  H  2278 

R.A.    =  5h40m19s 
Decl.  =  +  56°  53' 


1900.780 

.782 


130?  7 
130.8 


24^84 
24.95 


1900.78       130.7      24.90 

f  found  137?6  :  22^43  (1783.50)  In.    The  proper 
motion  is  small,  0-027  in  244?0. 


D.M.(12°)901.     8.1  ...  13 

R.A.    =  5h41m15' 
Decl.  =  +  12°     1' 


1900.744 

.763 

1901.873 


339?  1 
338.2 
340.3 


10.02 
9.15 


1901.13       339.2       9.45 

Measured  in  looking  for  H  5465,  which  should  be 
about  lm/. 


1900.744 

.763 

1901.873 


561.    L  10969. 

R.A.    =5h41m18! 
Decl.  =  +  12°  22' 

3?0 
2.8 
3.3 


7.4  ...  13 


1901.13  3.0 

Measured  in  looking  for  H  5465. 


19^17 
18.93 
19.02 

19.04 


S  500.    L  10961  and  10963. 

R.A.   =5"  41  "-53* 
Decl.  =  +  32°  56' 

1901.796       89?3 
.799       89.2 


8.5  ...  8.5 


59^99 
59.95 


1901.79  89.2  59.97 

No  other  measures  except  S,88?9: 59-46  (1825.06)3>i, 


H5465 

R.A.    =5"42m    5s 
Decl.  =  +  11°  57' 

The  description  in  H  is  45° ±  :  12"  ±  :  7  .  .  .  (1823) : 
"An  excessively  minute  companion  suspected."  I 
looked  for  it  with  the  6-in.,  1873-74,  and  with  the  18|- 
in.,  1878,  without  success;  and  there  is  no  companion 
visible  in  the  40-in.  on  two  nights,  1900-1.  The  place 
in  H  is  that  of  the  7.5m  star,  D.M.(11  )945. 


S  798.     7  ...  9.5 

R.A.    =5" 42™  25s 
Decl.  =  -    8°  25' 


1900.763 

.780 


180?  9 
181.1 


20^94 

20.87 


1900.77       181.0      20.90 

No  measures  since  A,  who  suspected  a  10*  com- 
panion. There  is  nothing  nearer  than  the  S  star. 
Unchanged. 


56  Orionis. 

R.A.    =5h46 
Decl.  =  +    1 

1901.873      212?  5 
.876      211.1 


13.5 


13s 
49' 


1901.87 


211.8 


43^45 
43.37 

43.41 


Taken  by  mistake  for  59  Orionis.    There  are  no 
other  measures. 


Anderson.    L  11231.    7.8 

R.A.   =5"49n'18s 
Decl.  =  -  19°  44' 


1900.780 
1901.873 


20?  5 
20.0 


10.4 


9^26 
9.02 


1901.32  20.2  9.14 

Given  in  Hall's  observations  as  discovered  by 
Geo.  Anderson  with  the  26-inch.  The  place  is  in 
error  by  about  2m  R.A.  and  16'  Decl.  The  only 
measures  are : 

1876.09        19?4        9aO        2n        Hall 


H  5466.    D.M.(-1°)1075. 
R.A.    =  5h51'"38s  ) 
Decl.  =     •    1°  50'  \ 

Given  in  H  as  8m,  with  the  note:  "seen  double, 
but  not  verified  by  magnifying."  The  place  is  that 
of  the  9.2m  star  given  here.  The  40-in.  shows  a  14m 
companion,  110?7  ;  16M  (1901.79). 


24 


S.    W.    BUBNHAM 


25 


£  V.  100.    59  Orients.    ...  9.7 
RJL   =5h52°'10s( 
Decl.  =  -h    1°  49'  \ 

1900.780               204?3               36-76 
1901.876               204.4               36.73 

No  measures  in  the  last  century. 
1783.79        229?0        72^83        In        ? 

The  small  star  appears  to  be  D.M.(19°)1252.    The 
proper  motion  of  A  is  small,  0'020  in  95?8. 

H  2302.    71  Orionis 

RA.    =  6"   7m46'  ) 
Decl.  =  +19°  12'  \ 

1900.744               203U               29^20 
.780               202.4               29.38 

1901.32                 204.3               36.74 
The  proper  motion  is  very  small,  0'015  in  136?3. 
The  only  measures  are  : 
1783.02        205?±        37T25        In        Tj. 
1878.18        205.8          36.57        In        /3 

S  829.    8.9  ...  10.2  ...  10.4 

Decl.  =  -  11°  42'  \ 
A  and  B 
1900.763               235?  5               17?69 
.780               235.8               17.93 

1900.76                 202.7               29.29 

H  estimated  the  positions.    The  only  measures 
are  by  Engelhardt,   202?4  :  3K98(  1886.21  )2n.     The 
change  is  due  to  the  proper  motion  of  A,  0'203  in 
213?3. 

H  2315.    11.7  .  .  .  11.7 

RA.    =6»15"'    6s  / 
Decl.  =  -     7=  14'  \ 

1901.796                   3?1                 6-'37 
.873                   2.1                  6.36 

1900.77                 235.6               17.81 
BandC 
1900.763               220?1                 5^60 
.780               220.7                 5.29 

1900.77                 220.4                 5.44 
J  could  not  see  the  smaller  star.    S  found  217?7  : 
4  '56  (1832.  69)  2n  and  238?4  :  16^50  for  AB,  which 
indicate  some  change. 

2861 

RA.    =  6h  3"  36s/ 
Decl.  =  +  30°  42'  \ 

A  and  B 
1900.780                 17?3               64.'92 
1901.720                 17.1               65.79 
.722                 16.7               65.60 

1901.83                    2.6                 6.36 

Given  by  H,  3?0:  l'±  :  13  =  13  (1830),  but  the 
distance  may  be  underestimated.     It  is  S.D.(7P)1384 
given  as  10m.    In  looking  for  this,  a  very  close  pair 
was  found  about  1"^  and  2  H.    This  is  the  8m  star, 
L  12112. 

S  529.    W1  VI.  883.    7  ...  8  ...  12 

RA.   =6»30n>51s  ) 
Decl.  =  +  12"  17'  \ 

A  and  B 

1901.815               153?  8               73  -'85 
.838                154.6                74.11 

1901.41                   17.0               65.47 
BandC 
1900.780               138?4                 l-'65 
1901.720               138.1                 1.58 

1901.25                 138.2                 1.61 
Xo  change  iii  BC,  but  the  distance  of  A  is  slowly 
decreasing.    Seabroke  thought  the  principal  star  was 
a  0'5  pair.     It  appears  now  perfectly  round. 

9  VI.  72.    68  Orionis.    B  =  8.6 

R.A.    =  6h   4™  55s  ) 
Decl.  =  +  19°  49'  \ 

1900.744               214?9               85-'52 
.780               213.7               85.56 

1901.82                 154.2               73.98 
AandC 

1901.815               169?  1             167^99 
.838               169.2             168.32 

1901.82                 169.1              168.15 

No  measures  since  South  in  1825.12;  162?9  :  91  '99 
and   170?7  :  187  -'91.     This  change  is  explained  by 
the  proper  motion  of  A  of  0'289  in  194?  7.    B  is  a 
red  star. 

1900.76                 213.8               85.54 

25 


26 


MEASURES  OF  DOUBLE  STABS 


OS  154.    L  12831.    6.4  ...  8.5 

R.A.    =  6"35ra52s  ) 
Decl.  =  +40°  4.5'  \ 

1900.782               123?6               26M)7 
1901.720               123.3               26.15 

H  748.    S.D.(8°)1706.    8.4  ...  10.5  .  .  .  11.5 

R.A.   =6h57m12s  ) 
Decl.  =    -    8°  10'  \ 

A  and  B 
1901.796               170?6                 6^79 

1901.25                 123.4               26.11 

.873               171.9                 6.91 

Rectilinear  motion. 

1901.83                 171.2                 6.85 
AandC 
1901.796               356?  9               15^29 
.873               358.1               15.21 

6  (jreminorum.     if.  VI.  7o—  o  5o3.     ii  —  9.5 

R.A.    =6h36ra33s  ) 
Decl.  =  +25°   15'  \ 

1900.782               94?  1               110  ?41 
1901.818               93.9               110.49 

1901.83                 357.5               15.25 

In  Messier  50.     H  gave  the  angles  170?4  and  0?5 
(1820). 

O21fi4»v/      L  13675      73         112 

1901.30                 94.0               110.45 

No  measures  since  South,  93?7  :  11U58  (1825.04) 
2w.    The  proper  motion  is  very  small,  0'025  in  258?4, 
which  should  give  an  increasing  distance. 

R.A.    =6"58n'20s  ) 
Decl.  =  +  25'    3'  J 

1900.782                 50?  6               13  .'80 
1901.818                 49.9               13.51 

S  967  rej.    S.D.(5°)1797.    8.2  ...  10.5 

R.A.   =6"40m25s  ) 
Decl.  =  -    6°    0'  J 

1900.763               189?9               13^22 
.780               191.7               13.36 

1901.30                  50.2               13.65 

At  this  time  there  were  no  published  measures  in 
the  last  fifty  years.     Madler's  distance  in  1843  is 
9  '09.    Hussey's  measures  in  1899  agree  with  mine. 

2  1033 
R.A.    -  7h  5™  19s  ) 

1900.77                 190.8               13.29 

The  only  measures  are  from  the  introduction  to 
Mens.  Mic.,  191?5  :  11.  '5  (1832.2)  S. 

Decl.  =  +  52°  45'  \ 
A  and  B 

1901.799               281?8                 U64 
.835               274.4                 1.82 

H  740.    8.2  ...  8.7  ...  11.7 

R.A.    ±=  6h45ra38s  ) 
Decl.  =  +    0°  36'  \ 

1901.82                 278.1                 1.73 
AandC 
1901.799               271?  9               80  '02 
.835                271.4                79.29 

A  and  B 

1900.763                   8?0               2K03 
1901.167                   8.0               20.93 

1901.82                 271.6               79.65 
C  is  not  in  S.    No  change  in  AB. 
1783.06        266?  3        67^77        In        f 

1900.96                    8.0               20.98 
BandC 

1900.763               281?4                 8  .'72 
1901.167               282.1                 8.42 

1880.53        271.7        78.80        2n        Ball 

OS  168  rej.     L  13937 

R.A.    =  7"   5'"395  ) 
Decl   —  +  21°  33'  \ 

1900.96                 281.7                 8.57 

The  only  measures  are  : 
1880.59           8?0        20f84        4w        /3 

A  and  B 
1900.782                 66?3               24^20 
1901.167                 67.2               23.78 

1880.60        283.8          8.18        2n        /3 

1900.97                   66.7               23.99 

26 


S.    W.    BUBNHAM 


27 


A  and  C 

1900.782               114?3               51*97 
1901.167               114.3               51.70 

D.M.(20°)1775.    6  ...  13 

RA.    =  7"14m52s  ) 
Decl.  =  +  20'  40'  \ 

A  and  B 
1900.782               205?  1               17^62 
1901.818               205.1               17.89 

1900.97                 114.3               51.83 

At  this  time  no  published  measures  since  1868. 
From  his  measures,  compared  with  those  of  J,  Hus- 
sey  finds  for  the  proper  motion  of  A,  0.'047  in  126?6. 

W2  VII  118.    8.2  ...  8.7 

R.A.   =  7"  5™  58*  ) 
Decl.  =  +  15°  23'  \ 

1901.167               157?0                 2^16 
.818               157.3                 2.27 

1901.08                  205.1                17.75 
BandC 
1900.782               245?2                 7*73 

Taken  at  first  for  H  1775.    The  principal  star  has 
a  proper  motion  of  0*075  in  263?9. 

9  V.  66  =  S  548.    6.9  ...  12.2  .  .  .  8.4 
RA.    =  7h20m31s  £ 

1901.49                 157.1                 2.21 

In   Weisse    "duplex  2"."     No  other   measures. 
The  magnitude  in  D.M.  is  7.5. 

H  2372.    D.M.(20°)1768.    8.1  ...  12.5 
RA.   =  7h12m43s  ) 

!-)„„!      —      1      Of)*     A-l  I    ( 

Decl.  =  +22=  23    J 
A  and  B 
1901.203                 19?  6               11*52 
.876                  18.6                11.38 

1901.54                    19.1                11.45 
AandC 
1901.203               276?  4               35  .'32 
.876               276.2               35.29 

1901.818                   2?3               22.'45 
.876                   3.3               22.34 

1901.54                 276.3               35.30 

No  material  change  in  the  bright  stars.   The  only 
prior  measure  of  B  is  by  Espin  in  1892.    C  is  dis- 
tinctly greenish. 

9  V.  63  =  Sh  368.    63  Geminorum 

RA.   =  7h20m37s  ) 
Decl.  =  +21°  42'  \ 

1900.782               323?  2               42*77 
1901.203               323.0               42.91 

1901.84                    2.8               22.39 
No  other  measures. 

S  546.    8.5  ...  8.6  ...  8.6 

R.A.    =  7h13m    4s  ) 
Decl.  =  +31=  42'  \ 

A  and  B 

1901.720               358?  8               82*98 
.818               358.6               82.88 

1900.99                 323.1               42.84 

The  large  star  has  a  proper  motion  of  0*122  in 
214?1  (Berlin  A.G.).     Tf.  made  the  distance  44*25 
(1785),  and  Sh  the  angle  326?2  (1826).    The  only 
complete  measures  are  : 
1863.2        324?3        44  .'61        Kadcliffe 

Y  Canis  Minoris.     .  .  .  13.0 

RA.    =  7h21m38s  ) 
Decl.  =  +    93  10'  \ 

1901.203               240?  2               31'28 
.873               241.5               31.47 
.878               243.6               31.22 

1901.77                 358.7               82.93 
A  and  C 

1901.720               68?0               143*94 
.818                68.1                144.14 

1901.77                 68.0               144.04 
The  only  other  measures  are  : 

1825.12        359?4          79*60        In        S 
1825.11          69.2        142.64        In        S 

These  stars  are   D  M.(31°)1540,  1541,  and  1543. 
There  are  faint  stars  between  AB  and  AC. 

1901.65                  241.8                31.32 

27 


28 


MEASURES  OF  DOUBLE  STABS 


The  only  measures  are  : 

1836.19        247?3        34^62        In        Lament 
1878.06        243.2        32.60        In        ft 

The  large  star  has  a  proper  motion  of  0'093  in 
286?9,  and  the  change  shown  by  the  measures  corre- 

H 3973.    S.D.(20°)1999.    8.4  ...  9.3 

R.A.   =  7h26m37s  ) 
Decl.  =  -  20°  40'  \ 

1901.873                 37?7                 9-00 
1902.222                 38.8                 8.65 

sponds  to  this  movement. 

S  550.    6.8  ...  7.1 

R.A.    =  7h22m15s  / 
Decl.  =  -  18°  15'  \ 

1901.167               115?8               39'54 
.206                116.1                39.55 

1902.05                  38.2                 8.82 

H  gives  36?3  :  8?±  (1837.10),  and  calls  the  com- 
panion "remarkable   brick  red."      It   is  decidedly 
reddish.     This  pair  is  catalogued  as  new  by  See 
(=X81). 

S  1115.    S,D.(12°)2016.    9.5  ...  9.6 

1901.18                 115.9               39.54 

The  only  other  measures  are  by  S,  116?2  :  40^04 
(1825.03)  2n.    These  stars  are  L  15459  and  15460, 
the  positions  giving  112?9  :  38  '65  (1800). 

R.A.    =  7h26m59s  ) 
Decl.  =  -  12°  37'  \ 

1901.873               139?  9               12^35 
1902.222               140.1               12.12 

S  1101.    9...  9.1 

R.A.    =  7h23">lls  ) 
Decl.  =  -  13°  34'  \ 

1901.167                 89?  1                 6^37 
.203                 88.4                 6.47 

1902.05                 140.0               12.23 

Without  change.     The  companion  is  S.D.(12°) 
2017.    (See  next  pair.) 

J  13.    S.D.(12°)2019.    9.6  ...  13.7  ...  9.7 
R.A.   =  7h27m20!  ) 

1901.18                   88.7                 6.42 

The  only  measures  since  S  are  by  Ma  and  A.    No 
motion. 

Decl.  =  -  12°  34'  } 
A  and  B  (new) 
1901.873               208?  8                 3^11 
1902.222               209.3                 2.70 

S  1104.    L  14619 

R.A.    =  7"  23'"  55s  ) 
Decl.  =  -  14°  44'  \ 

A  and  B 

1902.05                 209.0                 2.90 
A  and  C  (=  A  13) 
1901.873               287?6               1K87 
1902.222                288.9                11.75 

1900.780               330°3                 2f40 
1901.873               333.5                 2.30 

1902.05                 288.2               11.81 
In  the  field  with  S  1115  ;  the  wide  stars  noted  by 

1901.132               331.9                 2.35 
A  and  C.    C  =  11.7 
1900.780               187?6               20-'43 
1901.203               186.0               20.63 

Dembowski.    The  large   telescope   shows   a  nearer 
component.    The  only  measures  of  AC  are  : 
1867.10        288?4        ll-'44        2n        A 

1900.99                 186.8               20.53 
A  and  D.    D  =  11.6 
1900.780                  5?8               37^88 
1901.203                    5.7                38.29 

S  555.    L  14888.    7.5  ...  7.7 

R.A.    =  7h31m  10s  ) 
Decl.  =  -  14°  10'  \ 

IQfil    9TV!                     99fl°Q                     QH'7A 

1900.99                    5.7               38.08 

1902.219                228.4                95.77 

The  distant  stars  not  in  S.    A  has  a  proper  mo- 
tion of  0-312  in  216?1.    The  change  in  C  and  D  from 
the  measures  of  Engelmann  in  1882  is  due  to  this 
motion  of  A. 

1901.71                 228.3               95.75 
Nothing  else  since  South  : 
1825.00        227?7        94f37        In        S 

28 


S.    W.    BURNHAM 


29 


H  765.    L  14890.    8.6  ...  11  ...  11 

t>    *          »r  h  QO  ra   Qfks    i 

iWiY.      —    I       •  •  _        •  r  '       1 

Decl.  =-+27'    0'  \ 
A  and  B 
1901.720               212?  8               23^52 
.818               212.3               23.59 

9  says,  ''near  9  Argus;  place  very  doubtful," 
and  gives  the  place  of  9  Argus.    His  estimate  of  the 
distance  is  8"  (1781).    This  star  has  a  proper  motion 
of  O.'lOl  in  133?8. 

OS  183  rej.     7.5  ...  12 

RA.   =  7h47m    8s  ) 
Decl.  =  +  16"  il'  1 

1901.815                 20?4               15f87 
.818                  20.1                15.71 

1901.77                 212.5               23.55 
A  and  C 
1901.720               296?7               40?84 
.818               296.3               40.55 

1901.77                 296.5               40.69 

No  other  measures.    Distances  estimated  15'  and 
18'  by  H.    A  has  a  proper  motion  of  0'163  in  181?9. 

H  2405.    24  Lyncis 

RA.    =  7h32»51»  ) 
Decl.  =  +58'  59    > 

1901.799               319?  2               54^50 
.854               319.8               54.86 

1901.81                   20.2               15.79 
Probably  unchanged  ;  19?8  :  16^19  (1878.12)  3n  ft 

S.D.(13°)2277.    7  ...  12  ...  12 

RA.    =  7M7m26s  ) 
Decl.  =  -  13=  45'  \ 

A  and  B 
1901.167                161?  6                42^39 
.203               163.5               41.29 

1901.82                 319.5               54.68 

No  other  measures.    H,319?4:60-=t.    The  proper 
motion  is  small,  0'077  in  217?7. 

Procyon 

RA.   =  7h33"   1*[ 
Decl.  =  +   5'  33'  ^ 

A  and  C 
1897.884        341  ?2        57  -'40 

S  560.    6.5  ...  8.6 
RA.   =  7»41">   0s  ( 

1901.18                  162.5                41.84 
BandC 
1901.203               145?  9                 4-'  16 
Measured  in  looking  for  §  III.  28. 

D.M.(50=)1495.    8.9...  8.9 

RA.    =  7"  49™  22'  ) 
Decl.  =  +50°  35'  f 

1901.742               103?6                 3-'24 
.799                104.8                  3.17 

Ltecl.  —  -f-  22a       4     ) 

1901.720               358?7               89^50 
.818               358.9               89.68 

1901.77                 104.2                 3.20 

"  Duplex  "  in  Harvard  A.G.    The  only  measures 
are  by  Espin,  285?2  :  3-'14  (1900.12)  2». 

D.M<-1C)1949.    95...  9.5 

RA.   =  7h59m  47s  ) 
Decl.  =  -     1°  25'  \ 

1902.145               178?6                 6-'62 
.222               178.9                 6.89 

1901.77                 358.8               89.59 
Without  change.    The  only  measures  since  S  are  : 
1873.24     .  358?7        89^90        4,<        or 

9  III.  28.    L  15389.    7.1  ...  10.7 

RA.   =7h46">53*  ) 
Decl.  =  -  13"  33'  i 

1901.203               194?1               23^93 
.206                195.5                24.07 

1902.18                 178.7                 6.75 

Described  as  ''duplex  or  nebulous"  in  Nico.  A.G. 
Xo  nebulous  appearance  with  the  40-inch. 

1901.20                 194.8               24.00 

29 


30 


MEASURES  OF  DOUBLE  STARS 


W2VII.  1609 

R.A.    =  8h   Om    7' 
Decl.  =  +31°  54' 

Noted  "duplex?"  in  Weisse. 
There  are  two  distant  companions 
be  of  any  interest  (1901.72). 

H3308.    D.M.(35°)1767. 

R.A.   =  8h   2m21' 
Decl.  =  +35°  49' 

1901.722               263?  3 
.742               263.2 
.758               263.4 

! 

It  is  not  double. 
,  but  too  remote  to 

7  ...  10.8 

I 

45^81 
45.65 
45.75 

AandC 

1901.742               280?4               77  .'60 
.854               280.5               77.70 

sen- 

1901.80                 280.4               77.65 

?  V.  109.    6  ...  10.5 

R.A.    =  8"  19-  27s  ) 

Decl.  =  +    V  57'  \ 

1901.203               342?6               3K22 
1902.142               342.1               31.70 
.145               342.9               31.32 

1901.83                 342.5               31.41 
The  only  earlier  measures  are  : 
1783.14        325?0        35^40        In        ? 
1880.61        343.0        31.86        2n        ft 

The  large  star  does  not  appear  to  have  any 
sible  proper  motion.     Probably  without  change. 

A.G.C.  3.    p  Hydrae.    5  ...  12.5 

R.A.    =  8"42m    5s  ) 
Decl.  =  +    6°  17'  i 

1901.873               146?  5               12^05 
1902.145               145.5               12.04 

1901.74                 263.3 

Only  H,  234?6  :  40"  ±  (1831). 
has  a  proper  motion  of  0'328  in 
measure  A  was  thought  to  be  a 
verified. 

H2430.    D.M.(53°)122.    8.9 

RA.   =8"   3«'49» 
Decl.  =  +53°  43' 

A  and  B 
1901.742                311?2 
.799                309.4 

45.74 

The  principal  star 
138?  1.     In  my  first 
close  pair,  but  not 

.  .  .  12  .  .  .  12.5 

i        . 

20^44 
20.37 

1902.01                 146.0               12.04 

Discovered  by  Alvan  G.  Clark  with  the  McCor- 
mick  26-inch.     Apparently  without  change. 

1878.07        144?9        12?40        3w        ft 

H  4146.    L  17541.    6.7  ...  12 

R.A.    =  8h46m48s  ) 
Decl.  =  -  12°  47'  \ 

1901.167               103?  2               34^00 
.203               102.9               33.68 

1901.77                 310.3 
BandC 
1901.742               184?0 
.799               180.2 

20.40 

8^20 

8.55 

1901.77                 182.1                 8.37 

H  gives  311?5  :  15"±  and  177°±  :  3"±  and  mags. 
8,  13,  and  14.    No  other  measures.    The  magnitude 
in  D.M.  is  9.2. 

OS  190  rej. 

R.A.    =  8"  12"-  36s  [ 

Decl.  =  +  47"  48'  \ 

A  and  a  (=  Hussey  224) 
1901.742                316?3                 4  .'09 
.854               317.3                 4.09 

1901.18                 103.0               33.84 

H  gives  99?2  :  35°  ±  :  6  .  .  .  14  (1836).    His 
is  I1"  in  error. 

S  585.     6  ...  6.3 

R.A.    =  8M9m    4s  ) 
Decl.  =  -  17°  45'  \ 

1901.167               146?  9               66^82 
.203               146.9               66.84 

K.A. 

stars 

1901.80                 316.8 
A  and  B 
1901.742               167?4 
.854                167.6 

4.09 

38^57 
38.43 

1901.18                 146.9               66.83 

S  gives  323?2  :  69-'36  (1825.22)  3n.     These 
are  L  17636  and  17638. 

1901.80                  167.5 

38.50 

30 


S.    W.    BUBNHAM 


31 


Schjellerup  11.    9.1  .  .  .  9.2 

R.A.   =9"   lm36M 
Decl.  =  +   0°  16'  \ 

1901.203               259?2                 6?46 
1902.222               261.3                 6.53 

S  611.    S.D.(13')3193-4.    9  ...  9 

R.A.   =10"  35™  53s  ) 
Decl.  =    -  14°    5'  ) 

1902.145               193?  9               59-60 
.219               193.3               59.55 

1901.72                 260.2                 6.50 

First  noted  by  Schjellerup,  and  given  with  esti- 
mated position.    The  principal  star  is  D.M.(0°)2462. 
There  is  no  evidence  of  motion.     The  only  other 
measures  are  : 
1874.26       260?9       6  .'21        2n        A 

f  VI.  47.    3  Leonis.    6  ...  10.5 
R.A.   =  9h22m   6s  I 

"T\0rtl      __       1          Qo      JO/     f 

1902.18                 193.6               59.57 
The  only  other  measure  is  : 
1825        193?8        59.'33        In        S 

H  838.    41  Sextantis.    6  ...  11.7 

R.A.   =  10h44ra17s  ) 
Decl.  =      -    8°  16'  \ 

1901.299               303?9               27?04 
.337               302.2               27.06 

1901.167                 80?2               24^90 
.299                 79.3               24.84 

1901.32                 303.0               27.05 

The  only  other  measures  are  303?8  :  26^95  (1878.18) 
Iw  /3.    H  called  the  small  star  17  18m 

1901.23                   79.7               24.87 

No  measures  by  9.   The  later  positions  do  not  show 
any  material  change.    The  only  other  measures  are  : 
1852.19        81?6        25r?l        2n        Lassell 
1879.48        79.2        25.14        3n        ft 

S  617.    6.6  ...  8.5 

RA.    =  10h47m19'  ) 
Decl.  =          V  37'  J 

1901.167               177?8               35^25 
.203               178.3               35.42 

T  Hyarae.    jp.  VI.  71  —  on  lUo  —  U  llo< 

RA.   =9h23m   3s  ) 
Decl.  =  -    2°  15'  \ 

1901.206                   3?  7               65f29 
.299                  3.3               65.31 

1901.18                 178.0               35.33 

The  proper  motion  in  the  A.G.  is  0^130  in  230?1 
for  each  star.  The  components  are  L  20956  and  20957. 

1800             179?  7        34^11                   Lalande 
1824  22        177  8        35  22        2n        S 

1901.25                    3.5               65.30 

The  A.G.  proper  motion  of  A  is  0?118  in  91  ?9,  and 
B  (L  18661)  0'180  in  90°.    As  they  are  moving  at 
nearly  the  same  rate,  there  is  little  change. 
This  pair  was  subsequently  "observed  and  cata- 
logued by  Sir  John  Herschel  as  $  1167,  but  given 
with  an  error  of  1°  in  the  declination.    There  is  no 
doubt  of  its  identity  with  r  Hydrae. 

1880.66        178.6        35.09        3n        Schiap 

H  4410.    O.Arg.S.11162.    7.5  ...  13 

RA.  =llh  2-  19s  ) 
Decl.  =    -  15'  19'  j 

1901.206              222?6              19^33 
.299               221.8               19.71 

1800             1?4        66  .'12                   Lalande 
1821.23        3.2        66.68        In        Sh 
1887.3         3.0        65.32                   A.G. 

S  604.    L  18884.    7.1  ...  8.7 

R.A.    =  9h29°>59'  ) 
Decl.  =  -  19°    2'  J 

1901.206                 90?  5               51^44 
1902.222                  90.5                51.20 

1901.25                 222.2               19.82 

Only  H,  205?3:  15"  (1836.4).    He  calls  it  "diffi- 
cult," so  the  apparent  change  in  angle  may  not  be  real. 

H  177.    S.D.(2°)3297.    9.6  ...  10.1 

RA.   =11"  3™  21s  ) 
Decl.  =      -    2°  46'  ) 

1901.206               128?  1                 4f93 
.299               131.1                 4.87 

1901.71                   90.5               51.32 
The  only  other  measures  are  : 
1825.17        90?5        5K84        2n        S 

1901.25                 129.6                 4.90 

H  gives  110°  ±:  2",  and  says,  "hardly  divided 
with  the  sweeping  power." 

31 


32 


MEASURES  OF  DOUBLE  STARS 


I,  1518  rej.    D.M.(6°)2421.    7.5  ...  9.7  ...  9.9 

R.A.   =11"  8»  18s  / 
Decl.  =    +   5°  55'  J 

BandC  (=  2  1518  rej.) 
1901.167               350?  5                 2^80 
.299               353.0                 3.69 
.318               353.2                 3.72 

The  only  other  measures  are  : 
1878.24        351?6        30-'20        In        /3 

The  principal  star  has  a  proper  motion  of  0'184 
in  319?5,  which  evidently  does  not  belong  to  the 
small  star. 

Ho  52.     11  Comae.    5  ...  12.3 

1901.26                 352.2                 3.40 
A  and  B 
1901.167               256?  7              103^49 
.299               256.2             103.52 

R.A.    =12"  14™  39s  ) 
Decl.  =    +18°  27'  j 

1901.203                 45?4                 9-'15 
.299                 41.6                 9.16 

1901.23                 256.4             103.50 

.356                 43.7                 9.13 

No  other  measures.    Described  as  Class  I  in  2. 

W2  XI.  621. 

R.A.   =  llh33Tfs  > 
Decl.  =    +21'  59'  J 

This  star  (=  D.M.(22°)2387)  is  noted  "duplex  3'  " 
in  Weisse.    Examined  on  two  nights  in  1901,  but 
not  seen  double  or  with  any  near  companion.     It  is 
a  curious  fact  that  in  the  Berlin  A.G.  this  star  has 
the  note,  "Comp.  9.5  1"-2"1"    It  is  about  \mp  93 
Leonis.    I  examined  the  star  in  question  in  May, 
1874,  with  the  6-in.  without  seeing  it  double. 

1901.28                   43.6                 9.15 

The  large  star  has  a  proper  motion  of  0'145  in 
308?3.      Comparing    these  positions   with   those  of 
Hough  in  1892,  it  is  very  probable  that  the  small 
star  has  the  same  movement. 

Albany  A.G.    D.M.(2°)2550.    8.5  ...  8.8 

R.A.   =  12"25m   5s  / 
Decl.  =    +    2°  46'  \ 

1901.356               286?  9                 U40 
.375               287.5                 1.24 

H2955 

R.A.    =  ll»59m16s  ) 
Decl.  =    +  39°  20'  \ 

The  description  in  H  is  315°  ±  :  15"  ±  :  8  .  .  .  18 
(1830);  "extremely  faint."    Examined  on  two  nights, 
and  no  companion  visible. 

2  1601 

R.A.    =  12"  0™    2'  ) 
Decl.  =    +39°  30'  \ 

1901.203               311?6                 2M5 
.318                311.7                  2.31 

1901.36                 287.2                 1.32 

Noted  "duplex?"  in  the  Albany  Catalogue.    This 
is  a  new  pair;  no  other  measures. 

Pritchett. 

R.A.   =  12h,31m    0'  ) 
Decl.  =      -    7"    0'  ) 

A  double  star  is  given  in  this  place  in  the  Morri- 
son Observations,  7-6?8  :  5^89  (1880.36)  In;   magni- 
tudes not  given.    I  carefully  examined  the  place  and 
vicinity  without  finding  any  pair  of  this  description. 
It  should  be  a  short  distance  p  the  5m  star,  26  Vir- 
ginis. 

1901.26                 311.6                 2.38 

Measured  in  looking  for  the  preceding  pair,  H 
2955. 

H  203.    W  XII.  94.    6.8  ...  12.7 
R.A.   =  12"   8m    6s  J 

H  522.    30  Comae.    6  ...  11.7 

R.A.    =  12h45m51s  [ 
Decl.  =    +28°  13'  \ 

1901.318                  11?8                42^46 
.337                  11.3                43.22 
.356                  12.0                43.08 

Decl.  —    —   5      3    \ 

1901.203               351?9               26?62 
.206                351.3                25.77 
.318                350.7                26.18 

1901.34                   11.7               42.92 

The  only  other  measures  are  10?0  :  43'17  (1878.15) 
In  /3.    H  gave  the  magnitudes  6  and  18.     His  R.A. 
is  about  2Jm  too  small.    The  proper  motion  is  0'115 

1901.24                 351.3               26.19 

in  287?7. 

32 


S.    W.    BCBNHAM 


33 


8  Virginia.    3i  .  .  .  105 

RA.    =  12"  49°  34'  ) 
Decl/=    +    4°    3'  \ 

1901.203               139°2             157  -'81 
.263               140.2             158.26 
.414               139.4             158.13 

-*he  companion  is  S.D.(12;)3801.    This  pair  has 
been  entirely  neglected  by  observers  since  £,  and 
the  only  measures  are  : 
1783.18        306?9        2U82        In        Tj. 

S  1739  rej.    D.M.(31=)2478.    9^  ...  10 

1901.29                 139.6             158.07 

The  principal  star  has  a  proper  motion  of  0'499  in 
263°  1.    The  only  other  measures  are  : 
1879.30        142°3        152  '03        2n        ft 

RA.    =  13"  16"  57s  t 
Decl.  =    +31=     9    ( 

1902.145               132?  7               12  .'93 
.219               131.7               12.63 

The  computed  place  of  the  companion  for  1901, 
from  the  first  measures  and  the  proper  motion,  is 
139"  9:  158  '00. 

H2645.    53  Virginia.    B  =  11.8 

RA.   =  13"  5-  40s  ) 
Decl.  =    -  15°  33'  \ 

1901.299                   7?3               77  .'59 
.318                   6.9               76.52 
.356                   7.8               77.16 

1902.18                 132.2               12.78 
No  other  measures. 

75  Virginia.    5  ...  13.5  ...  12 

RA.    =  13"  26"  27s  ) 
Decl.  =     -  14°  45'  \ 

A  and  B 
1902.145               321?0               18?82 
.219               319.3               18.98 

1901.32                    7.3               77.09 

No  other  measures.    H  estimates  30°  ±  :  50'  ± 
(1830).    The  large  star  has  a  proper  motion  of  0'289 
in  164°8. 

1902.18                 320.1               18.90 
AandC(=H2658) 
1902.145               109?9               79-'74 
.219               110.1               79.50 

OS  261 

RA.    =  13"   6m24s  ) 
Decl.  =    +32°  31'  \ 

1889.288                344?  9                1'45 

Sh  162.    7.2  ...  7.7 

RA.   =  13h   8»  39'  ) 
Decl.  =     -  10°  43'  \ 

1902.145                 50?8               7U14 
.219                 50.5               71.30 

1902.18                 110.0               79.62 

The  faint  star  not  previously  seen.     The  only 
complete  measures  of  AC  are  : 
1879.31        110?1        78-'29        2n        ft 

S  1757 

RA.   =13"  28-°    9s  ) 
Decl.  =    +    0*  18'  \ 

1901.203                 76°  7                 2?41 
.263                 78.8                 2.59 

1902.18                   50.6               71.22 

.280              •  78.9                 2.35 

The  principal  star  has  a  proper  motion  of  0'388 
in  219°4.    The  components  are  respectively  L  24582 
and  24584. 

1823.34        61?7        44-'85        In        Sh 
1881.37        52.5        64.60        3»        ft 

9  IV.  119.    S.D.(12°)3802.    7.5  ...  10 

RA.  =  13"  16"  25'  i 
Decl.  =    -  12'  33'  \ 

1902.145               312?  2               19^29 
.219               310.5               19.04 

1901.25                   78.1                 2.45 

Although  two  orbits  have  been  computed  of  this 
pair,  the  motion  seems  to  be  purely  rectilinear,  the 
change  being  due  to  the  difference  of  the  two  proper 
motions.     That  of  the  principal  star  is  0'270  in 
277°9.    (See  Popular  Astronomy,  IV,  172.) 

H2659 

RA.   =13h28mll5  I 
Decl.  =    +  40°  33'  \ 

The  description  in  H  is  315'+  :  10"  :  8-9  ...  18; 

1902.18                 311.3               19.16 

"  requires  verifying."   I  could  not  see  this  companion 

33 


34 


MEASURES  OF  DOUBLE  STABS 


with  the  18|-in.  in  1878,  nor  with  the  40-in.,  1901.20. 
The  nearest  star  is  13m,  202?3  :  38  '1.    It  is  probable 
that  H  was  mistaken.   His  place  is  that  of  D.M.(40°) 
2666,  given  as  7.4m. 

H  2676.    D.M.(50°)2021.    7.8  ...  9.7 

R.A.   =13h38">12s  ) 
Decl.  =    +50°  38'  \ 

1901.337               126?0               29^67 
.356               125.0               29.66 

pen 

R.A.   =13"  31-  15-  ) 

Decl.  =    -  14°     7'  \ 

1901.299               260?5                 4^56 
.356               260.1                 4.79 

1901.34                 125.5               29.66 

Recently    measured    by    Espin.      Nothing    else 
since  H. 

S  1782. 

1901.33                 260.3                 4.67 
Measured  in  looking  for  the  Egbert  pair. 

R.A.   =13h39m22s  ) 
Decl.  =    +  18°  58'  \ 

1902.145               185?6               29'72 
.219               185.0               29.67 

H2666.    S.D.(H°)3763 

R.A.   =  13h32m   2s  > 
Decl.  =    -  14°  13'  \ 

1901.299              177?6        '      13^83 
.318               179.4               14.87 
.366               182.4               14.19 

1902.18                 185.3               29.69 
No  recent  measures,  but  unchanged. 

Howe.    D.M.(6°)2824.    9  ...  9.1  ...  11 

R.A.   =l3"57n'22s  ) 
Decl.  -    +    6°  22'  \ 

1901.32                 179.8               14.30 
H  gives  176?7  :  8'±  :  9  .  .  .  15  (1830). 

A  and  B 

1901.203                 65?6                 0?93 
.263                 64.9                 0.92 

Egbert 

R.A.   =  13h34m   :     ) 
Decl.  =  -  14°  26'  :  \ 

1901.23                   65.2                 0.92 
AB  and  C 
1901.203               189?3               14^33 
.263               188.7               14.20 

Measured  once  at  Cincinnati,  349°3  :  11  '70  :  9  ... 
10  (1879.30).    There  is  no  such  pair  in  or  near  this 
place.    About  2m/  there  is  a  small  pair,  0?5  :  15  '43  : 
8.5  ...  13.5  (1901.35)  In.    This  star  is  S.D.(14°)3783. 
The  descriptions  do  not  correspond,    ft  611  is  in  the 
same  vicinity. 

S  1774  re./.    7  .  .  .  10.5 
R.A.   =13"  35"-  39s)  . 

"Ha^l      -            1     K1  o        7  '    f 

1901.23                 189.0               14.26 

No  recent  measures.    Probably  unchanged.  Iden- 
tified as  above. 

21801 

R.A.   =13"  59™  27s) 
Decl.  =    +   6"  32'  J 

1901.203                 67?  5               19^51 
.263                 68.4               19.72 

1901.337               133?7               17^87 
.356               134.1               17.83 

1901.23                  67.9              19.61 

1901.34                 133.9               17.85 

The  principal  star  is  given  in  Harvard  A.G.  a 
proper  motion  of  0'172  in  305?1.    The  only  prior 
measures  are: 

1879.26        134?2        17^93        In        ft 
The  distance  now  should  be  3  '7   more    if  the 

Howe.    S.D.(12°)3958.    8.2  ...  8.7 

R.A.   =13"  59-  30s) 
Decl.  =    -  IS'  30'  J 

1901.203                   7?5               13?46 
.225                   7.6               13.34 
.299                   7.6               13.34 

proper  motion  is  correct  and  the  small  star  is  fixed. 

1901.24                    7.6               13.38 

34 


S.    W.    BUENHAM 


35 


The  original   place  is  only  approximate.     The 
R.A.  is  about  2m  in  error.    The  only  other  measures 
are  in  1879.    Apparently  fixed. 

13  Booth.    9  VI.  112.    5  ...  95 
RA.   =  14"  3-  48'  > 

Eepin.    D.M.(52=)1792.    9  ...  103  ...  9 

RA.   =14"  16"  15s  ) 
DecL  =    +  52"  13   \ 

AandB 

1902.145                 46?8                 1'75 
.219                 47.8                 1.68 

DecL  =    +  50°    1'  J 

1902.219              274?3              81^14 
.222               274.4               80.99 

1902.18                   47.3                 1.71 
AandC 

1902.22                 274.3               81.06 

1902.145               170-6               40-83 
.219               170.1               40.86 

The  companion  is  preceding1  the  other.    The  only 
measures  are: 
1783.63        82?6        77^97        In        H 
1879.33        95.0        83.47        1»        Cin 

The  proper  motion  of  the  principal  star  is  very 
small,  0'06  in  323°. 

S1807 

RA.   =  14"  5=    6s"  ) 
DecL  =    -    2°  46'  $ 

1901.203                 2-  .«•                 6^88 
299                 26  0                 6  88 

1902.18                 170.3               40.84 

Discovered  by  Espin.    No  other  measures  of  AB. 
The  A.G.  positions  give  for  AC  190?1  :  41  -'75  (1875.7). 

H2714.    (=Ho385).    7  .  .  .  11 

RA.    =14h17n'18s) 
DecL  =    -  19°  15'  \ 

1901.263              280?  1              23^09 
.280               278.4               23.05 

1901.25                  27.4                 6.88 

H  1248.    12  ...  12.2 

RA.  =  14"  9-58') 
DecL  =    +    7"  54'  ) 

1901.356               163?2                 7-'90 
.370               163.9                 7.99 

19U1.Z7                   Ziy.Z                £i.vi 

The  angle  seems  to  be  increasing  ;  266?4(1830)H  ; 
276?1(1879)P;  277?0(1891)Ho.    The  principal  star  is 
L  26283. 

H  546.    S.D.(12  )4042.    7  ...  10.4 

RA    —  14  h  18  m  48  5  / 

1901.36                 163.5                 7.94 

H  gives  340°  ±  :  2'±  :  16  .  .  .  16.17  (1828),  and 
savs.  "  The  most  minute  double  star  I  have  hitherto 

oon  "      Tt  i<=  •>  littl»  e  «f  t>if>  Q  -1m  «far    D  Hf  ^Sc  V>*^Jtl 

DecL  =     -  12°  49    \ 

1902.145                 42?6               39-35 
.219                 42.2               39.43 

As  in  nearly  all  cases  of  this  kind,  H  greatly  under- 
estimated the  distance. 

Howe.    D.M.(24°)2711.    8.5  ...  10.0 

RA.  =14"  H-  6s) 
DecL  =    +  24°    2'  J 

1902.145                 79?2                 3  '35 
.219                 78.6                 3.48 

1902.18                  42.4               39.39 

The  K.A.  in  H  is  4°  too  small,  and  the  Decl. 
about  1°  too  small.    He  called  the  components  red 
and  blue.    Xo  other  measures. 

S  1852  rej.    B.A.C.  4799.    12  ...  95 
RA.   =14"  23°  45s) 

1902.18                   78.9                 3.41 

Howe  (Cin.5)  measured  a  pair  in  this  place,  193?  7  : 
5-42  :  8^  ...  10.5  (187935)  In.     Unless,  there  is  a 

DecL  =          3°  43  '  \ 

1901.225               267?9               24-74 
.263               268.1               24.63 

large  error  in  the  measure  or  the  place,  there  would 
seem  to  be  considerable  relative  motion.    There  is 
no  other  pair  in  the  vicinity. 

1901.24                 268.0               24.68 
No  early  measures,    ft  268?1  :  25  -'16  (1879.30)  3n. 

35 


36 


MEASURES  OF  DOUBLE  STARS 


H  2728.    p  Bootis.    4  . 

R.A.   =  14h26m425 
Decl.  =    +30°  54' 

1902.145      335?9 
.219      335.8 


12.5 


50^14 

49.98 


1902.18       335.8      50.06 

Meridian  positions  give  for  the  proper  motion 
0'151  in  316?9.    The  earliest  complete  measures  are: 
1879.87        334?0        53^25        2n        ft 


Hd  Zones.    D.M.(1°)2964 

R.A.   =  14»35m385  ) 
Decl.  =    +    0'  54°  J 

In  Harvard  Zones  "  appeared  elongated."  I  could 
see  no  sign  of  duplicity  (1901.20).  If  double,  it  must 
be  very  close. 

Sh  186.    a  Librae 


R.A.    =  14"44m12s 
Decl.  =    -  15°  32' 


1901.280 
.299 


314?0 
314.2 


231 ?08 
230.97 


1901.29       314.1      231.02 

No  recent  measures.  The  smaller  star  is  8  Librae. 
Auwers  gives  0'168  in  237?6  for  the  p.m.  of  A,  and 
0?153  in  241?9  for  the  other. 


1755  314? 9 
1823  314.5 
1880  314.4 


231  .'18 
230.85 
230.70 


H564.    D.M.(29°)2618.    8 

R.A.   =  14h59mlls 
Decl.  =    +29"  33' 

1901.206  32? 9 

.225  32.6 


Bradley 

Sh 

Gr.  10-year 

11.4 


1901.21 


32.7 


4U18 
41.34 

41.26 


H  gives  20° ±  :  15"  ±  :  6  ...  20  (1820).  There  is 
no  bright  star  in  his  place.  The  one  measured  has 
the  same  K.A.,  but  is  about  20's,  and  is  probably 
the  star  in  question. 


1936.    D.M.(27°)2478 

R.A.    =15h16ra    2s 
Decl.  =    +  27°  28 


i 


1901.206 
.318 

1901.26 


231?5 
232.0 

231.7 


20  .'36 
20.30 

20.33 


No  recent  measures,  and  only  Ma  and  A  since  S. 
Put  on  the  list  to  identify  and  get  correct  place. 
Error  in  Mens.  Microm.  Without  change. 

OS(App.)140.    8.'.  .8 

Decl.  =    +    8°  59'  [ 

1901.471  179? 7  111T96 

.512  179.8  112.32 


1901.49 


179.7 


112.14 


The  only  other  measures  are  by  A,  179?9  :  111 '85 
(1874.97)  2n.  The  components  are  L  28309  and 
28310. 

•y  Librae.    4.5  ...  11.7 

R.A.    =  15"28m48s 
Decl.  =    -  14°   23' 


1901.471 
1902.219 


152?  5 
152.9 


42f04 
41.81 


1901.84       152.7      41.92 

Companion  first  noted  by  Goldschmidt  (Comp. 
Rend.  LVI,  845).    The  only  previous  measure  is  : 
1878.32        151?8        4U31        In        ft 


OS  297.    8...  11.5 

R.A.    =  15h29m40s 
Decl.  =    +  25"  25' 

1901.318  138? 6 
.320  136.2 
.395  137.1 


1901.34 


137.3 


4^24 

4.81 

4.77 

4.61 


The  change  is  due  to  proper  motion.  I  do  not 
find  this  is  given  from  meridian  positions.  From  all 
the  measures  Hussey  gets  0'149  in  156?5  for  the 
movement  of  A. 

W2  XV.  752  =  D.M.(23°)2838 

R.A.   =  15»33m10s  ) 
Decl.  =    +23=     4'  \ 

Noted  in  Weisse  "duplex?"  A  7.4m  star,  and 
certainly  not  double  (1901.28). 


D.M.(4°)3055.    8.5  ...  9.0 

R.A.    =  15h39m22s 
Decl.  =    +    4"  55' 

1901.375      146? 3 
.395      144.9 


1901.38 


145.6 


2. '19 
2.09 

2.14 


36 


S.    W.   BUBNHAM 


37 


Noted  as  double,  160"  :  2',  in  the  Albany  A.G. 
Not  in  any  double-star  catalogue,  and  no  other 
measures. 

Pritchett.    D.M.(36')2640.    9  ...  9 

E.A.   =  15"  40=  12s) 
Decl.  =    +35°  59'  J 

1901.359       44?4       4^46 
.395       46.0       4.58 


45.2 


4.52 


1901.38 

Discovered  by  Pritchett,  who  found  45?1 : 3 '94 
(1881.52)  In.    No  other  measures. 

Skinner.    S.D.(16°)4169.    8.5  ...  8.7 

R.A.    =  15"45">32S 
Decl.  =     -  16°  52' 

1901.455      275° 2       2?02 
.471      273.0       2.00 


2.01 


1901.46       274.1 

Noted  as  double  by  Professor   Skinner  at   the 
Naval  Observatory.    No  other  measures. 

H  1281.    L  28977.    7.1  .    .  11 


1901.280 
.299 


R.A.   = 

Decl.  =    -  15°  41 

230?  9 
231.3 


34^43 
34.38 


34.40 


1901.29  231.1 

H  estimated  215°  :  18"  :  6-7  ...  20.     The  only 
other  measures  are  229?8  :  35-'12  (1890.36)  In  ft. 


W  XVI.  2.    8.4  ...  9.2 

R.A.    =  16"   2m27! 
Decl.  =    +20°  42' 

1901.356      224? 6 
.375       224.9 


12^12 
12.22 


1901.36  224.7  12.17 

In  Weisse  "duplex  12"."     No  other  measures. 

S2017 

R.A.    =  16h   6m37s  ) 
Decl.  =    +  14°  52'  \ 

1900.455  252?9  26^64 

.458  252.8  26.55 


1900.45 


252.8 


26.60 


Perhaps  a  small   change  in  distance.     S  found 
25 '03  (1831.42),  and  A  25-95  (1867.65). 


S  2018  rej.     S.D.(7  )4234.    8.4  .  .  .  9.1 


R.A.   =  16"   7 
Decl.  =    —    7 


10s/ 

7°  20'  f 


1901.359  355?3  19'51 

.375  355.8  19.36 

.455  355.0  19.60 

1901.39  355.4  19.51 

No  other  measures.  Identified  as  above. 


S  2019  rej.    S.D.(10°)4276.    8  ...  9.2 

R.A.   =  16 " 
Decl.  = 

1900.455      152? 7      22^48 
.458      153.0      22.25 


.   =  16"   7">42S  i 
1.  =    -  10'    T  \ 


1900.45  152.8  22.36 

The  only  other  measures  are  in  the  Washington 
Observations  of  1862,  109?2 :  19-11  (1862.7).  This 
may  be  another  star. 

S  2031  rej.    D.M.(-1°)3761.    7.6  ...  9.7 

R.A.   =  16h10ra   9s  / 
Decl.  =       •    1'  21'  f 

1901.359  230?2  20.'80 

.395  229.5  20.85 

.416  230.0  20.66 


1901.39  229.9  20.77 

No  other  measures;  Class  IV  in  2.  The  principal 
star  is  L  29649,  and  has  a  proper  motion  of  O'lOo  in 
270°. 


<r  Coronae 

R.A.   =  16h10m12s  ) 
Decl.  =    +  34°  10'  \ 

A  and  B  (=  2  2032) 

1901.263      213? 6       4^34 
.320      212.8       4.30 


1901.29       213.2 

B  and  C  (=  02  538) 
1901.263      202? 7 


4.32 


5^58 


The  distance  of  the  13.5m   star  is  diminishing 
from  the  proper  motion  of  AB. 


S  3103  rej.    S.D.(3°)3921. 

R.A.   =  16"  14 m  24s 
Decl.  =    -    3=  40' 


1901.395 
.414 


305?3 
304.9 


...  9.7 


24^18 
24.56 


1901.40  305.1 

No  other  measures. 


24.37 


37 


38 


MEASURES  OF  DOUBLE  STABS 


(3624 

R.A.    =  16h15m42s  ) 
Decl.  -     -  22°  50'  \ 

1901.359               320?4                 K19 
.433               323.5                 1.21 

P  815.    D.M.(43°)2605.    8.3  ...  10.5 

R.A.   =  16h23m16*  ) 
Decl.  =    +43°  11  '  J 

A  and  B 
1901  375               340?  8                 9  '19 

.1901.40                 321.9                 1.20 
Observed  in  trying  to  find  H  4851. 

.395               340.9                 9.09 
.397               340.2                 9.22 
.414               340.2                 9.13 
.416               340.7                 9.28 

Anon.    S.D.(3°)3929,  3930.    7.6  ...  8.7 

R.A.   =  16  h  16  '"14s  ) 
Decl.  =    •  -    3°  58'  } 

1901.375                 22?4               99^70 
.416                 22.5                99.97 

1901.40                 340.56               9.18 

A  and  C  (C  =  11.5) 

1901.375               160?  4               67^71 
.395               160.4'             67.79 
.397               160.6               67.95 

1901.39                  22.4-            99.83 
Measured  in  connection  with  2  3103  rej.     The 

.414               161.5               67.55 
.416               160.6               67.80 

meridian    positions    in    Lamont    give   22?  7  :  92  '44 
(1855.5). 

H4851 

R.A.    =16"  17™    7s  ) 
Decl.  =    -  22°  45'  ) 

The  description  in  H  is  96?9  :  15'  ±  :  8  .  .  .  11 

1901.40                 160.7               67.76 

BandC 

1901.375               160?3               76^95 
.395               160.3               77.40 
.397               160.7               77.15 
.414               160.9               77.09 
.416               160.5               77.23 

(looi.A).    i  looKea  in  vain  lor  tnis  ooject  in  loyi, 
and  again  in  1901.    There  is  no  such  star  in  or  near 
this  place.    I  see  now  that  there  is  an  error  of  lh  R.A. 
in  this  place,  and  that   the  star  is  identical  with 
H  4948,  which  is  17"  17m  10";  --22°  42'.    The  de- 
scriptions correspond  perfectly.    Measures  of  that 
will  be  found  here  in  the  proper  place. 

S  2038  rej.    D.M.(2°)3091.    8.6  ...  10.4 

R.A.   =  16"  17™  29s  ) 
Decl.  =    +    2°  30'  \ 

1901.455               214?  7               16^49 
.471               213.7               16.41 

1901.40                 160.5               77.16 

It  will  be  remembered  that  B  has  a  large  proper 
motion  for  so  small  a  star.    I  have  measured  the 
faint  star  C,  which  is  exactly  in  line  with  AB,  for  the 
purpose  of  determining  whether  any  of  the  change 
in  AB  is  due  to  the  movement  of  A.     I  have  also 
compared  the  latter  star  with  D.M.(43")2608,  and 
find  for  the  difference  of  Declination  22^52  (1901.41). 
This  difference  in  the  A.G.  is  22  '2,  so  that  it  is 
practically  certain  that  A  has  no  appreciable  proper 
motion.    My  measures  of  AB   in  1881,  and  those 
given  here,  give  for  the  proper  motion  of  B,  0'147  in 
323?3. 

1901.46                 214.2               16.45 

No  other  measures. 

S  2042  rej.    D.M.(6°)3225.    8.3  ...  11.1 

R.A.   =  16h19m56s  J 
Decl.  =    +    5°  59'  i 

Sh233 

R.A.    =  16h25m43=  ) 
Decl.  =    +    8°  a3'  \ 

1900.551                 71?3               58^90 
1901.210                  71.1                58.80 

1901.375               108?  9               20  .'28 
.395               108.3               20.58 
.414               109.4               20.20 

1900.88                    71.2                58.85 
Relatively  fixed.    71?8  :  58^86  (1858.48)  2n  OS. 

1901.39                 108.9               20.35 
No  other  measures. 

In  1874  I  thought  that  one  of  these  stars  was  a  close 
double,  but  both  were  round  in  the  last  measure 
with  fine  seeing. 

38 


S.    W.    BUBNHAM 


39 


Hd  Zones.    L  30078.    9  ...  9.1 

RA.   =,16"  26-°  10s  ) 
Decl.  =    +   0°  28'  f 

1901.375               305?7                 6?94 
.414               303.3                 6.94 
.455               305.7                 6.92 

S  2069  rej.    L  30278.    6.8  ...  10.4 

RA.   =16"  31-  55s  ) 
Decl.  =    +34°    *'  J 

1901.356                 72?  6               26  -'82 
.375                 71.8               26.56 
.395                 71.1               26.62 

1901.41                 304.9                 6.93 

Noted  as  double  in  the  Harvard  Zones,  and  also 
in  the  Gottingen  Catalogue.     No  other  measures. 
In  the  field  about  3's  is  a  10m  star  with  a  double 
companion. 

H  4864.    S.D.(6°)4457.    9.5  ...  12.8 
RA.    -  16h26m49s  > 

1901.37                   71.8               26.67 
No  other  measures. 

S  2081  rej.    L  30416.    7.8  ...  10.5 

RA.    =  16"  37"   4s  i 
Decl.  =    +   3'  41'  i 

1901.375               321?  9               21  '31 
.41^4                322.2                21.40 

Decl.  =      -   6;  19'  \ 
A  and  B 
1900.455                 91?4               10.'07 
.458                 89.8               10.25 
1901.433                 87.7               10.39 

1901.39                 322.0               21.35 

A  more  distant  companion  of  about  same  magni- 
tude, 178?2  :  42  '3.     No  other  measures. 

2  2093  rej     TI  Herculis     3         12 

1900.78                   89.6               10.24 
A  and  C  (C  =  14.5) 
1900.455               134?  8               13-55 
.458                140.4                13.22 

RA.   =16"  38  -47s) 
Decl.  =    +39:     9    $ 

1901.337               262?  2             114  '27 
.356               262.2             114.27 

1900.45                 137.6               13.38 

Simply  described  in  H  as  "  triple  Classes  I  and 
II."    There  is  a  10m  star,  234?3  :  73'2. 

22062.    8.4...  10.5 

RA.   =16"  28-"  42*) 
Decl.  =    +    8°  56'  \ 

1900.458               lll?o                 2^55 
551                113  6                  2  50 

1901.34                 262.2             114.27 

Principal  star  round.     The  only  measures  of  the 
small  star  are  261?1  :  113'39  (1879.27)  In  ft. 

Skinner.    S.D.(17')4630.    8.4  ...  8.5 

RA.   =  16"  39°  20s  ) 
Decl.  =     -  17°     8    \ 

1901.455                 86?  7                 3-'46 
.473                  85.5                  3.69 

IfW^I        t(>                                             Oi?      I                                           Q      X7 

1900.50                 112.5                 2.52 

The  only  measures  since  1857  are  my  own  in  1880.' 
There  is  no  change. 

Young.    D.M.I  58=)1646.    8.2  ...  9.5 

R.A.    =16h29">26s  ) 
Decl.  =    +58°    1'  J 

1901.375               216?5                 L'30 

iyui  .  io                 oo  .1               o  .  o  i 

Discovered  by  Professor  Skinner  at   the  Naval 
Observatory   with    the    meridian    instrument.      No 
other  measures. 

H  1294.    L  30509.    7  ...  12.5 

RA.   =  16h40m56s  ) 
Decl.  =     -  24=  19'  J 

1900.455               131?  3               24^95 
1901.433               132.3               25.03 

.433                214.9                  1.48 

1900.94                 131.8               24.99 

1901.40                 215.7                  1.38 

Discovered    by    Professor    Young,    219?5  :  1'59 
(1883.76)  In. 

No  other  measures.     H  gives   135"  ~  :  18'^  :  7 
...  17  ;  "  large  star  red."    To  me  it  appeared  yellow 
only. 

39 


40 


MEASURES  OF  DOUBLE  STARS 


S  3108  rej.    L  30945.    8.4  ...  9.0 

R.A.    =  16"55m43s  / 
Decl.  =     -  11°  43'  \ 

1901.455               124?8               39^60 
1902.219               124.7               39.73 

The  previous  measures  of  this  pair  are  very  dis- 
cordant in  distance,  but  there  is  probably  no  change 
since  S,  who  found  23?2  :  7M7  (1830.15). 

1901.83                 124.7               39.66 
No  other  measures. 

Howe.    S.D.(10°)4619.    8.7  ...  12.7 
R.A.    =  16h56m41s  ) 

<r  544.     12  Herculis.    5  ...  9.b 

R.A.   =  17h16m10s  ) 
Decl.  =    +32°  38'  \ 

A  and  B 
1900.473               332?  6             207^33 
.476               332.0             207.76 

Decl.  =    —  20°  13'  \ 

1900.455               180?  9                 6-'  15 
1902.430                174.0                  6.21 

1900.47                 332.3             207.54 
B  and  C  (C  =  12.5) 
1900  473               216?  1                 8^64 

1901.44                 177.4                 6.18 

.476                217.5                  8.73 

The  only  prior  measure  is  a  single  observation  of 
the  position-angle    182?6  (1879.55),  with  only  ap- 
proximate place.    H  4911,  which  is  about  2Jmp  of  this, 
was  suspected  by  H  to  have  a  small  companion.     I 
have  looked  for  it  several  times.     It  is  certainly 
single.    His  place  is  that  of  O.Arg.S.  16213. 

H  2804.    9.5  ...  9.6 

R.A.   =  17h  Ora31!  / 
Decl.  =    +39°    9'  \ 

1902.219               277?7               15.'14 
.433                277.8                15.19 

1900.47                 216.8                 8.68 

The  change  in  B  is  due  to  the  proper  motion  of 
A,  1'037  in  174?1.    No  other  complete  measures  of  C. 

H  4948.    S.D.(22")4341.    8.3  ...  9.8 

R.A.    =  17h17m    9s  ) 
Decl.  =     -  22°  41'  \ 

1901.433               106?  2               12^91 
.455               105.2               13.37 
.512                104.8                13.13 

1902.32                 277.7               15.16 
Not  in  D.M.    Previous  measures  discordant. 
1830+          283?  8        20"  ±        In        H 
1880.48        280.4        17.25        2n        Bigourdan 
1900.53        278.3        15.44        2n        Espin 

S  2144  rej.    S.D.(7")4419.    7.6  ...  10.2 

R.A.    =  17h10m53«  ) 
Decl.  =    -    7°  44  '  \ 

1901.375               182?  8               25  .'65 

1901.47                 105.4               13.14 

H  4851  has  an  error  of  lh  in  the  E.A.  and  is  iden- 
tical with  the  pair  measured. 

OS  329  rej.    (=  S  688).    L  31771 

R.A.   =  17  "20"'  17s  ) 
Decl.  =    +37°     3'  \ 

1900.458                 12?  7               32^74 
1901.320                 12.2               32.62 

.414                 18  Z.  4                zo.zo 

1900.89                   12.4               32.68 

1901.39                 182.6               25.45 

The  only  other  measure  is  a  single  observation  by 
Mitchell,  4?0  :  25^73  (1848.60).    The  angle  should  be 
reversed. 

S  2149. 

R.A.   =17h13m325  / 
Decl.  =      -    6"  18'  S 

1901.203                 24?  1                 7.  '34 
1902.430                 24.8                 7.42 

Without  change. 

H  1299.    L  31783.    7  ...  12  ...  12.5 

R.A.   =17"21m12s  / 
Decl.  =    +26°  59'  \ 

A  and  B 
1901.375                 21?0               50.'53 
.395                 19.9               50.78 

1901.81                   24.4                 7.38 

1901.38                   20.4               50.65 

40 


S.    W.    BUBXHAM 


41 


A  and  C 
1901.375                 57?5               52^69 
.395                 57.6               62.55 

H  4986.    O.Arg.S.17253    8.2  ...  11.2 

RA.    =  17"42n>501  ) 
Decl.  =    -  26°  18'  j 

1901.38                   57.5               52.62 
H  gives  for  the  angles  20?7  and  60?5  (1828). 

1901.375               226?  2               10^26 
.433               226.7               11.04 
.452               226.5               10.56 

2  2189  rej.    7.9  ...  105  ...  8.6 

RA.    =  17"  29"  37s  ) 
Decl.  =    +  47"  58'  ) 

A  and  B 
1901.356               100?5               20-'88 
.375               100.0               21.06 
.433                 99.4               21.27 

1901.42                 226.5               10.62 
No  measures.    H  gives  330°  =  :  12'±  (1834.3); 
probably  error  of  100;.    There  is  a  13m  star  5-4: 
22^9,  and  12.5m  at  61  ?4  :  27  .'2. 

22230 

RA.   =  17"  44™  54s  ) 
Decl.  =    +    T~  57'  \ 

1901.39                 100.0               21.07 
AandC 

ana  15 
1900.458               108?  8               37^52 
.515               109.1               37.72 

1901.356               359?6               65'11 
.375               359.2               64.96 
.433               359.9               65.06 

1900.48                 108.9               37.62 
A  and  C 

1901.39                 359.6               65.04 

iyU0.4Oo                  83-2                4o-4o 
.515                 84.3               45.50 

A  and  C  are  D.M.(48')2532  and  2533.    The  only 
measures  of  AB  are  98°5  :  20-'58  (1900.53)  2u  Espin. 

Hd  Zones 

1900.48                   83.7               45.47 
B  and  C 
1900.458               208°5               19'26 
.515               211.0               19.05 

RA.   =  17"  32"  14s  ) 
Decl.  =    +   0°  56'  J 

Noted  as  "  double  "  in  Harvard  Zones.   The  place 
is  that  of  the  9.2m  star,  DJI^O°)3739.     It  is  not 
double. 

Skinner.    S.D.(15°>4651.    8.5  ...  9.0 

R.A.   =  17"  35-  20s  > 
Decl.  =     -  15°  40'  \ 

1901  512               275°  8                 4^33 

1900.48                 209.7               19.15 
The  principal  star  has  a  small  proper  motion  of 
about  0'017,  which  increases  the  distances  of  both 
companions. 

H  4995.    L  32695.    6.7  ...  11.7 

RA.    =17"  47"  26s  < 
Decl.  =    -  11°  19    \ 

1900.551               154?  6               28^60 
1901.263               156.1               28.48 

.586               276.0                 4.29 

1900.96                 155.3               28.54 

1901.55                 275.9                 4.31 

Discovered  by  Skinner  with  the  meridian  circle  of 
the  Naval  Observatory.    It  is  also  Hussey  184. 

2  2195  rej.    9  ...  9 

R.A.   =  17  "SB"  13s  ) 
Decl.  =    +  2r  13'  \ 

1QO1    .11.1                      ini°Q                     91  'Kf\ 

H  has  140°  ±  :  18'±;  "a  third,  closer,  suspected." 
Neither  this  telescope  nor  the  18^-in.  in  1878  showed 
any  other  companion. 

OS  (App)  160.    8.2  ...  8.6 

RA.    =  17h47»46s  ) 
Decl.  =    +10;  59  '  ) 

1900.458               190?  8             102^30 
.476               191.0             102.14 

.416               101.0               21.61 

1900.46                 190.9             102.17 

1901.41                 101.1               21.60 
No  other  measures.    In  the  field  2  '  or  3  p  2  2196. 

did  not  nnd  this,  and  there  are  no  other  meas- 
ures.   The  components  are  D.M.(10')3315  and  3314. 
The  A.G.  positions  give  191  ?6  :  100'87. 

41 


42 


MEASURES  OF  DOUBLE  STARS 


Holden.    L  32716. 


1900.551 
.553 


R.A.    =  17h48m13s 
Decl.  =      -  11°  37 

154?  3 
150.0 


6.7  ...  12 

s  ) 
'  \ 


1900.55 


152.1 


3?51 
3.56 

3.53 


Discovered  by  Professor  Holden  at  the  Washburn 
Observatory.    Unchanged. 


Bird.     O.Arg.N.17688.    9  ...  10.5  ...  9 

R.A.    =  17h52m55s 
Decl.  =    +  67° 

A  and  B 


55s  ) 
1'  \ 


1901.375 
.433 

1901.40 


1901.375 
.433 


325?  4 
326.3 


325.8 

•  A  and  C 

328?  5 

328.6 


1901.40 

1901.375 
.433 

1901.40 


328.5 

BandC 

333?  5 

331.9 


332.7 


1K83 
11.65 

11.74 


22^28 
22.40 

22.34 


10.'28 
10.35 

10.31 


The  wide  pair  AC  "  duplex  "  in  O.Arg.  The  faint 
star  between  discovered  by  F.  Bird  in  1869.  The 
only  other  measures  are  mine  in  1879. 


22253 

R.A.    =  17»52m55s 
Decl.  =    +14°  38' 

1901.203       78?4 
.225       78.2 


1901.21  78.3 

Distance  slowly  decreasing. 

OS  (App)  161 

R.A.    =  17"54m29's 

Decl.  =    +    8°  52' 


15^22 
15.50 

15.36 


1901.375 
.436 
.471 


76?  7 

77.2 
76.8 


62  .'36 
62.20 
62.27 


1901.43  76.9  62.28 

The  only  other  measures  are  by  J,  77?9 :  62?70 
(1874.98)  3n. 


W  XVII.  1120 

R.A.    =  17>'55m225  ) 
Decl.  =      -  14°  30'  \ 

"  Duplex  "  in  Weisse.    This  is  S.D.(14")4860,  8.7m 
Not  double,  and  no  near  companion. 


S  698.    L  33058.    7 

R.A.    =  17h56m57s 
Decl.  =     -  22°  30 

1900.551      316?  1 
1901.263      317.0 


.  8 


s  ) 
'  \ 


29  '70 
29.52 


1900.90       316.5      29.61  , 

No  other  measures  since  South,  317?4  :  30-'92 
(1825.51)  2n.  There  are  many  stars  in  the  field,  and 
several  nearer  than  B. 

H  5013.     S.D.(15")4801.    9.7  ...  11.7 

R.A.    =  17"  57 ">  38s 
Decl.  =     -  15°     5' 

1901.455      338?4      13-'31 
.529      338.6      13.53 


1901.49  338.5  13.42 

The  only  observations  by  H,  339°  ±  :  4"  ±  :  9 


.  13. 


A.C.  15.    99 
R.A.    =  18h   2m28s 
Decl.  =    +30°23' 

1898.269 


.271 
.463 


317?5 
322.4 
320.8 


1898.33 


320.2 


l."04 
1.21 
1.19 

1.15 


Perry.    10.2  .  .  .  11.0 

R.A.    =  18 h   3'"  ± 
Decl.  =  +  9°20'± 

1900.551      313? 1       3^28 
1902.433       313.1       3.37 


1901.49       313.1       3.32 

Not  in  D.M.    It  is  about  I"/  D.M.(9°)3565.    The 
only  other  observation  is  305?0  :  2^0  (1881.38)  Perry. 

Alvan  G.  Clark.    102  Herculis.    5J  .  .  .  12.9 

R.A.    =  18h   3™  38s 
Decl.  =    +  20°  48' 

1900.458      135? 9      23^66 

.473      135.6      23.72 

1901.455       136.5       23.28 


1900.76 


135.7 


23.55 


42 


S.     W.      BUBNHAM 


43 


The  only  prior  measures  are  mine,  136?  7  :  23  '42 
(1878.45)  In.    This  angle  is  erroneously  printed  46?7. 
The  proper  motion  of  A  is  small,  0'015  in  212?9. 

22285 
R.A.    =  18"  3m  45s  ) 

S2291 

R.A.    =  18"  5m  53s  ) 

Decl.  =    +34°    0  '  \ 

1900.473               339?  3               27  '01 
1901.299               339.0               26.85 
.320               339.4               26.53 

JJecl.  —    -j-  lo    ^o    ) 

1900.458               333?6                 3-50 
1901.203               333.2                 3.45 

1901.03                 339.2               26.80 
No  recent  measures.     Distance  increasing  ? 

1900.83                 333.4                 3.47 
Without  change.    No  late  measures. 

H  593.    S.D.(17°)5052.    8.2  ...  11.5  ...  9.5 

R.A.   =  18"  3m  48s  ) 
Decl.  =     -  17=  10'  ) 

AandC 
1901.455               303?4               18fl5 
.512               301.1               18.08 

1830.73        339?2        25'12        2K        S 
1868.02        339.2        25.90        4K        J 

H  1821.    S.D.(16°)4755.    9.2  ...  9.6 

R.A.    =  18"   5m545  ) 
Decl.  =     -  18°  20'  J 

1901.529               278?  0                 8  TOO 
1902.433               278.0                 7.62 

1901.48                 302.2               18.11 
A  and  B  (=  Hussey  195) 
1901.512                 75?8                 1'14 

Close  pair  discovered  by  Hussey  in  1900.    No 
other  measures  of  H  593  except  Glasenapp,  300?9  : 

1901.98                   2/8.0                   /.81 
Hhas273?6:4'±  (1828). 
A  and  S.D.(16°)4756 
1901.529                 13?  6               53^07 
1902.433                 13.4               53.25 

17^26  (1890.54)  2n. 

H  5030.    L  33330.    6  ...  10.8 

R.A.    =  18"   4m  24s  ) 
Decl.  =     -  23'  44'  \ 

1901.263               287?3               4U65 
.586               287.3               42.24 

1901.98                   13.5               53.16 

9  V.  93.    D.M.(28°)2955  and  2956 

R.A.    =  18"  8m  17s  ) 
Decl.  =    +283  13'  \ 

1901  203                 1S6°4                 'vt'Q? 

1901.42                 287.3               41.94 

.225               136.4               54.43 

The  only  other  measure  is  : 
1834.3        281?0        30"±         IK        H 

H  2820     9.5  ...  10.7  .  .  .  10.8 

1901.21                 136.4               54.70 

The  only  measures  are  : 
1783.65        135?  7        47^77         IK        ? 

R.A.    =  18  h   4  -"45s  ) 
Decl.  =     -  18°  26'  I 

A  and  B 
1901.455               279?3                 5^58 
.529               278.3                 5.72 

1880.40        136.4        54.88        3n        ft 

The  Weisse  meridian  positions  give  132?9  :  54  '10 
(1825).    Bigourdan  has  measured  another  pair,  or 
the  distance  is  erroneous. 

1901.49                 278.8                 5.65 
A  and  C 
1901.455                 82?  7               12  -'87 
.529                  83.8                13.10 

H  857.    W1  XVIII.  192.    8  ...  11 

R.A.    =  18"10m53s  ) 
Decl.  =          7°  20'  J 

1901  452                 20°3               21  '49 

1901.49                  83.2               12.98 

.509                 19.6               20.92 

The  principal   star  is  S.D.(18°)4826.     The  only 
other  observations  by  H,  281?9  :  3"±;  90?0  :  8'± 
(1830). 

1901.48                  20.0               21.20 
No  other  measures.    H  estimated  20"  :  15"  (1820). 

43 


44 


MEASURES  OF  DOUBLE  STARS 


H  5494.    B.A.C.  6213.    6  ...  11.8 

R.A.    =  18h13m20s  ) 
Decl.  =    +    7°  12'  \ 

1901.416                 69?  5               39W 
.509                 70.0               39.79 
.512                 70.0               39.60 

S  2332  rej.    9.2  ...  11.2 

R.A.    =  18h24m42s  ) 
Decl.  =    +  64°  50'  \ 

1901.433               262?  5               10^71 
.436               263.7               11.89 
.452               262.3               10.93 

1901.48                   69.8               39.49 

Only   the    estimates    of    H,    65°  :  45"  :  5  ...  15 

(1827.6). 

0.  Stone 

R.A.    =  18"  16™  :       ) 
Decl.  =      -  18°  55'  \ 

Given  in  Gin6  with  this  place,  84?6  :  6  '72  :  8.5  ... 
9.0  (1879.30).    No  such  pair  in  or  near  this  place.    A 

1901.44                 262.8               11.18 

No  other  measures.    Not  in  D.M.,  but  near  D.M. 
(64°)1267,  the  place  of  which  is  given  here. 

Schjellerup.    D.M.(7°)3741.    8.9  ...  9.0 

R.A.    =  18h27ra49s  ) 
Decl.  =    +    7°  21'  i 

1901.509               197?7               46^02 
.512                197.6                45.64 

nothing  answering  this  description  (1901.452).    The 
place  is  certainly  erroneous. 

S2311 

R.A.    =  18h16m38s  ) 
Decl.  =    +11°  23'  J 

1900.512               158?8                 5^65" 
.515               159.1                 5.72 

1901.51                 197.6               45.83 

From  list  of  new  pairs  in  A.N.  1485,  the  distance 
given  34".    No  other  measures.    Both  stars  in  D.M. 
There  is  a  13.5m  star  from  A,  119°  :  14  '5. 

S  2340 

R.A.    =18"28ra30s  ) 
Decl.  =    +31°  30'  \ 

1901.433               103?  9               23  '02 

1900.51                 159.0                 5.68 
The  motion  appears  to  be  rectilinear. 

.436               103.3               23.20 
.452                103.7                23.06 

1830.30        170?7        8f65        4n        2 

These  positions  give  for  the  proper  motion  of  A 
0:047  in  191?2. 

H  5496.    L  34034 

R.A.    =  18"  20-  40s  ) 
Decl.  =      -    8'     7  '  \ 

Given  in  H  as  6m  star,  "  suspected  double  with 
180."     I  could  not  see  any  companion  with  the  6-in. 
in  1876,  nor  with  the  40-in.,  1901.455. 

1901.44                 103.6               23.09 

The  change  appears  to  be  due  to  a  small  proper 
motion  of  one  of  the  stars. 
1830.43        104?6        21  ^51        Bn        2 

OS  356  re/.    L  34475 

R.A.    =  18"  29™  20s  ) 
Decl.  =    +40°     4'  \ 

1900.473               305?  9               36  .'11 
1901.225               306.2               35.98 

9  N.  125.    L  34048.    8.0  ...  8.1 

R.A.   =  18"  21™  33s  I 
Decl.  =     -25°     7  '  \ 

1901.551               281?  3                 2T67 
.647               282.2                 2.75 

1900.85                 306.0               36.04 

Distance  slowly  decreasing  from  proper  motion. 
Other  recent  measures  by  Hussey. 

S2345 
R.A.   =18"  30™  23=  ) 

1^/i^l      -             1      W\o     CQ  '     f 

1900.60                 281.7                 2.71 
No  measures  by  9>  given  as  Class  I.    The  follow- 

1901.436               203?8                 8^58 
.452                204.0                  8.53 

1889.77          99?0        U62        In        Ho 
1897.70        101.8        3.14        2n        See 

1901.44                  203.9                  8.55 
Rectilinear  motion.  Sfoundl85?l:7'38(1832.25)4n. 

44 


S.    W.    BUKNHAM 


45 


S2346 

RA.   =18"31-27S) 
DecL  =    +   7°  26'  \ 

1901.471               291?8               2\'Yl 
.586              291.2              21.19 

9  IV«  59  =  S  2354  rej.    8.5  ...  9.0 

RA.   =  18"  32"  45s  [ 
Decl.  =    +38'  38'  \ 

1900.473               302?1               29'52 
1901.225               302.7               29.40 

1901.53                 291.5               21.18 

The    motion    is  rectilinear,  distance  and  angle 
increasing. 

1829.64        282?9        15  .'41        4»        2 

These  measures  give  for  the  proper  motion  of  A 
0^091  in  132?5. 

S  2353  rej.    D.M.(58°)1823.    8.5  ...  11 

1900.85                   oOJ.4                 29.  4b 
Near  Vega.    The  only  other  measures  are  : 
1783.81        303?9        22'33        In        f 
1880.42        303.6        29.80        2n        ft 

S  2350  rej.    L  34569.    6.7  ...  11 

RA.   =  18"  33-°  30s  ) 
Decl.  =      -    1    54'  \ 

1901.395               196?4               22^16 
.452               196.1               22.18 

RA.   =18"  31"  36s) 
Decl.  =    +58°  41'  \ 

1901.299               258?  5               13'98 
.318               258.8               13.76 

1901.42                 196.2               22.17 
The  only  measures  are  : 
1848.64        194?8        24^54        In        Mitchell 
1880.02        196.8        23.27        2n        ft 

1901.31                 258.6               13.87 

The  only  measures  of  this  are  found  in  the  intro- 
duction   to  Metis.  Microm.,  258?7  :  13^2   (1832.8). 
D.M.(58C)1824,  which  is  4-'4s,  is  a  similar  pair  with  a 
little  less  distance. 

S  2365  rej.    8^  ...  10.0 

RA.   =18h34m21s) 
Decl.  =    -f  63°  36'  \ 

1901.433                 26?  1               19^58 
.436                 24.5               19.84 

O.Arg.S.18506.    8  ...  8.4  ...  103 

RA.   =  18h32m28s) 
Decl.  =    -25°  37'  \ 

A  and  B 

1901.529               216?  9                 7-'36 
1902.449               217.1                 7.22 

1901.43                  25.3               19.70 
No  other  measures.    The  principal  star  has  a 
proper    motion  of   0'282  in  193?2  (Porter).     The 
movement  in  A.G.  is  0'306  in  189?3.    This  is  D.M. 
(63°)1439  (=  Groombridge  2630). 

H  1336.    8^  ...  11.5  ...  11 
RA.    =  18"  35°  52s) 

1901.98                 217.0                 7.29 
AandC 
1901.529               285?  7               53^27 

Decl.  =    +  30°  11  '  \ 
A  and  B 
1901.263                 87  ?4               17.  '59 
.302                 86.7               17.62 

1902.449               286.3               52.97 

1901.28                   87.0               17.60 

1901.98                 286.0               53.12 
A  andD 

1901.529               217?4               80-'78 
1902.449               217.9               80.14 

A  and  C 
1901.302               176?7               32-'25 
The  only  other  observation  is  by  H,  89?0  :  8'db; 
300=±:15'±  (1828).    There  is  another  llm  star, 
295?9:32r6.    2  2367  is  47»/. 

1901.98                 217.6               80.46 

Noted   "duplex"    in  O.Arg.S.   and    "triple"  in 
Washington  Transit  Zones.    The  first  measures  from 
Washington  Observations,  1862,  do  not  agree  with 
the  present  positions  : 

1862.8        212?  8          7  '47 
1862  8        285  2        68  66 

Ho  437 

RA.   =18h35m58s) 
Decl.  =    +  31°  32'  \ 

AB  and  C 
1901.436               272?  1               39^61 
.452               273.2               40.02 

1862.8        218.5        79.02 

1901.44                 272.6               39.81 

45 


46 


MEASURES  OF  DOUBLE  STARS 


CandD 
1901.436                335?  8                  3^08 
.452                336.5                 3.48 

H  1353.    D.M.(11°)3654.    9.0  ...  9.6 

R.A.    =  18"  48-  42s  ) 
Decl.  =    +11°     9'  \ 

1901.44                 336.1                 3.28 
Seeing  too  poor  for  AB. 

1901.359               208?  0                 8^41 
.397               206.6                 8.26 

H  1337.    D.M.(31°)3330.    9.0  ...  11.6 

R.A.   =  18h36m22s  ) 
Decl.  =    +31°  28'  \ 

1901.436                162?  4                  9?08 
.452               162.5                 9.00 

1901.38                 207.3                 8.33 
The  only  measures  are  : 
1828+          212?2        5"±         In        H 
1879.45        208.1        8.41        2n        Gin 

Howe  (Gin5)  has  a  close  pair  in  this  place,  209?  1  : 
0'94  (1879.31)  In.    There  is  no  close  double  here, 

1901.44                 162.4                 9.04 
Observations  of  H  only: 
1828+        174?9        6"±         In 

D  M.(45°)2667.    8.9  ...  12.5  .  .  .  9.9. 

and  it  is  undoubtedly  an  error  in  reading  or  printing 
the  distance. 

Lewis 

R.A.   =  18h41m125  ) 
Decl.  =    +  45°  43'  \ 

A  and  B 
1901.263               132?4                 2.'  66 
.299                131.7                  3.15 
.302                132.0                 3.02 

R.A.    =  18h50m         ) 
Decl.  =    +34°  30'  \ 

This  pair  has  the  above  place  for  1900  (Mon.  Not., 
LX,  510)  with  the  following  measure  : 
1899.44        84?6        5fl3        8.0  ...  10.0        In 

The  place  is  substantially  identical  with  that  of 
the  79m  star  DM(34")3346     This  star  was  exam- 

1901.29                132.0                 2.94 
AandC  (=H1346) 
1901.263               216?  8               24  .'38 
.299                216.1                24.28 
.302                216.4                24.45 

ined  on  two  nights,  and  the  stars  in  the  vicinity  as 
well,  but  no  pair  found  to  answer  the  description. 

0647 

1901.29                 216.4               24.37 
B  is  not  in  H,  and  was  first  noted  by  Espin  (A.N. 
3717),  who  found  135?9  :  2f73  (1900.62)  2n. 

$  VI.  50.    6.4  ...  12.5  ...  8 

R.A.    =  18h50m29s  ) 
Decl.  =    +13°  27'  \ 

A  and  B 

1900.512                  16?  1                  If  07 
.515                  14.6                 0.87 

R.A.    =  18"  43*  15s  ) 
Decl.  =    •  -    6°    3'  I 

A  and  B 
1901.397               359?  4               22f83 
.452               360.3               23.30 

1900.51                   15.3                 0.97 
AandC 

1900.512               217?3               19f01 
.515               217.6               19.03 

.471               361.2               23.49 

1900.51                  217.4                19.02 

1901.44                 360.3               23.21 
AandC 
1901.397               170?6             113?75 
.452                171.0              113.53 
.471                170.7              113.98 

Change  in  the  distance  of  C  is  confirmed  by  these 
measures. 

p648 
R.A.   =  18"  52™  30s/ 

1901.44                  170.8              113.75 
The  small  star  B  was  first  noted  with  the  6-in. 
The  only  measures  are  : 
1879.37        356?8          22-'53        In        ft 
1879.35        170.5        113.98        2n        ft 

Decl.  =    +32°  45'  \ 

1900.473               215?3                 U24 
.553               225.6                 1.40 
.703               229.9                 1.37 
1901.203               218.3                 1.07 

A  and  C  are  S.D.(6°)4922  and  4923. 

1900.73                 222.3                 1.27 

46 


S.    W.    BURNHAM 


47 


H  1357.    D.M.(45=)2799.    8.0  ...  10.5 

R.A.    =  18h53m34s  ) 
Decl.  =    +  45°  42'  \ 

1901.433               213?2               26-'75 
.452               211.9               26.92 

H  2852.    D.M.(7°)3943.    9.1  ...  9.9 

R.A.    =  18h57m16s  ) 
Decl.  =    +    7°  14'  \ 

1901.512               131?2               22'63 
.586                131.4                22.41 

1901.44                 212.5               26.83 
The  only  prior  measures  are  : 
1828+        210°8        16'  ±        In        H 

S2427 

R.A.    =  18h53m57s  ) 
Decl.  =    +38°     i'\ 

A  and  B 

1900.473                 61?  3               48  '54 
itim   *»K                    Ai    «                  Ati  F;C; 

1901.55                  131.3                22.52 

H  called  the  components  red  :  blue-green;  134-5  : 
18'  ±  :  10  .  .  .  12  (1830). 

22442 

R.A.    =  18"  58™  20s  ) 
Decl.  =    +16°  48'  \ 

190].  299               207?5               18?37 
.703                205.4                18.20 

1901  50                 206  4               18  28 

1900.85                  61.5               48.54 
BandC 
1900.473                 79?  3                 7^04 
1901.225                 78.9                 7.32 

The    distance    is    decreasing,   with    no  sensible 
change  in  the  angle.    These  measures  with  those  of 
2  indicate  an  annual  movement  of  A  of  0'06  in  the 
direction  of  the  smaller  star.    In  the  course  of  some 

1900.85                   79.1                 7.18 

No  change  in  BC,  but  the  distance  of  AB  is  in- 
creasing.   A  comparison  of  these  measures  with  S's 
gives  for  the  proper,  motion  of  A  0'064  in  the  direc- 
tion of  41°. 

A.G.C.  9.    y  Lyrae 
R.A.    =  18h54m27s) 

three  hundred  years  these  stars  will  make  a  close 
pair. 

9  V.  33.     15  Aquilae.    6  ...  8 

R.A.    =  18h58m385  ) 
Decl.  =          4°  13'  J 

1900.458               208?4               37  -'05 
.473               208.2               37.42 

Decl.  =    +  32°  31'  J 

1900.515               298?9               12^87 
.551               299.9               12.91 
1901.210               300.1               12.69 

1900.46                 208.3               37.23 

The  proper  motion  of  A  is  very  small,  0'014  in 
300?3.    The  distance  of  JJ  in  1781  of  33  -'88  is  cer- 
tainly too  small. 

1900.76                 299.6               12.82 

H  874.    7.1  ...  13.3  .  .  .  11.7 

RA.    =18»54">35*> 
Decl.  =      -    0°  37'  f 

A  and  C 

H  5507.    6  ...  12.2 

R.A.    =  18"58m49s  ) 
Decl.  =     -  15=  50'  \ 

1900.458                 63?0               47^10 
1901.397                 63.3               46.76 

1901.390                 oU4-2                 23-01 
.397               304.6               22.92 
.455               303.9               22.94 

1900.92                   63.1               46.93 
H  only  estimated  the  angle  50'(1823.6).    There  is 

1901.41                 304.2               22.96 
A  and  B  (new) 
1901.395                   2?4                 9.'30 
.397                    0.4                10.05 
.455               359.0                 9.74 

a  14m  star  about  the  same  distance  in  94?8. 

H  1364.    D.M.(44°)3051.'   9.4  ...  9.4 

R.A.    =18h59m36'  ) 
Decl.  =    +  44°  17'  \ 

1901.41                    0.6                 9.70 
Xo  other  measures.    H  estimated  305°  :  15".    The 

1901.452               204?  7                 3  '13 
1902.433                207.7                  2.98 

principal  star  is  W  XVIII.  1351. 

1901.94                 206.2                 3.05 

47 


48 


MEASURES  OF  DOUBLE  STARS 


Described  by  H,  "  a  most  elegant  double  star  ; 
chief  of  a  small  cluster."    The  only  observations  are: 
1828+          204?5        l'±        In        H 
1881.45        206.9        3.26        3n        /3 

H  1365.    D.M.(26°)3443.    9.5  ...  11 

H  1374.    L  36113.    8.0  ...  11.7  .  .  .  13.5 

R.A.   =  19"  6™  34s  ) 
Decl.  =    +  44°  22'  \ 

A  and  B 
1901.263               115?  1               14?28 
.318               114.3               14.41 

R.A.   =  19h  0™  22s  ) 
Decl.  =    +26°  57'  \ 

1901.452               326?6               20?67 
1902.219               325.1               20.04 

1901.29                 114.7               14.34 
A  and  C 
1901.263                   5?i9               31-34: 
The  description  in  H  is  110?3  •  8"-t--  350°  +  •  15"-*-. 

1901.83                 325.8               20.35 

H  has  327?5:  15"  ±  (1828),  and  calls  the  colors 
ruddy  :  green. 

H  V.  103.    L  35845.    8.0  ...  8.3 

R.A.   =19"  I"  42s  | 
Decl  —    _|_  35°  42'  \ 

Schjellerup.    8.5  ...  8.8 

R.A.  =  19"  6™  40s  ) 
Decl.  =      -    3°  45'  i 

1901.452               230?  4               61?  16 
.455               230.2               61.02 

1901.225                 55?  3               55?66 
.299                 55.5               55.62 

1901.45                 230.3               61.09 
From  list  of  double  stars  in  A.N.  1485.    The  esti- 

1901.26                  55.4               55.64 
The  only  measures  are  : 
1783.63        60?  6        45?53        In        H 
1840.83        55.6        54.58        In        OS 
1866.68        55.5        55.08        In        OS 

S  2463.    D.M.(45°)2831 

R.A.   =19"   2m30'  ) 
Decl.  =    +  45°  38'  I 

mated  distance  is  given  48  .    The  components  are 
S.D.(3°)4513  and  4511. 

Madler  7  =  Ho  446 

R.A.   =  19"   7m43s  ) 
Decl.  =    +24°  23'  \ 

A  and  B  (new) 
1901.433               292?  4                 2?79 
.473               288.6                 2.56 
.512               291.0                 2.82 

A  and  B 

1901.529                   5?1                 9?44 
.605                   5.7                 9.49 

1901.47                 290.7                 2.72 
AandC 
1001   41  fi                   50°  0                  5  '01 

1901.57                     B.4                 9.46 
AandC 
1901.529               283?0               23?52 

.433                 50.6                 5.01 
.473                  45.2                  5.21 
.512                 48.8                 5.17 

.605               282.4               23.96 

1901.46                  48.6                 5.10 

1901.57                 282.7               23.74 

C  not  in  2  ;  first  noted  by  H,  who  gave  the  angle 
279?9  and  286?4  (1828).    No  other  measures  of  this. 

S  2477  rej.    8.5  ...  10.5 

R.A.   =  19h   6m   2s  ) 
Decl.  =      -    4°  40'  \ 

1901.452                 47?4               28?08 
.455                  46.3                27.87 
.471                 45.9               27.92 

B  is  new,  but  previously  seen  by  Aitken.    The 
measures  of  AC  are  : 
1843.63        58?3        8?69        In        Ma 
1893.67        45.4        5.69        3n        Ho 

The  principal  star  is  W2  XIX.  193. 

H  2858.    9.2  ...  12.2 

R.A.    =  19h   8m  46s  ) 
Decl.  =    +  22°  38'  \ 

1901.436               257?4               18?99 

1901.46                  46.5               27.96 

1902.219               257.9               19.06 

The  only  prior  measures  are  : 
1848.65        45?3        30'10        In        Mitchell 

1901.82                 257.6               19.02 
Hgives257?6:6'±  (1830). 

48 


S.    W.    BUBNHAM 


49 


H  2859.    9.2  ...  13 

RA.   =  19"  8"  47s  ) 
Decl.  =    +22°  40'  \ 

1901.436                 28T3               10^87 
1902.219                 28.8               11.53 

OS  (App)  178.    6  ...  7.5 

RA.    =  19"   9™  52s  > 
Decl.  =    +  14°  53    \ 

1900.684               267?8               89^91 
.687               267.4               89.83 

1901.82                  28.5               11.20 

H  gives  19?0  :  4'  ±  (1830).  The  relation  of  H  2858 
and  2859  is  10?2  :  132-'70  (1901.43). 

H  1377.    L  36224.    7.0  ...  12.9 

RA.  =19"  a-  51s) 
Decl.  =    +47°  10    $ 

1901.436               356?5               36^33 
.605               357.1               36.35 

1900.68                 267.6               89.87 
The  following  are  all  the  other  measures  : 
1856.60        86?7       -80-'84        In        Se 
1875.61      267.8        89.65        4u        J 

The  change  is  not  confirmed.    The  distance  of 
Secchi  is  an  error  or  misprint.    The  A.G.  positions 
give  268?0  :  89  '68.    The  components  are  L  36207 
and  36203. 

H  2862.    1  Vulpeculae 

1901.52                 356.8               36.34 

The  onlv  other  observation  is  by  H,  357°0  :  30"± 
7  ...  16  (1828). 

RA.   =  19"  11"    3s  ) 
Decl.  =  +   21=  11'  \ 

1901.416                 13?2               38^86 
.512                 12.6               39.16 
.586                 12.8               39.08 

H5101.    8.5...  9 

R.A.    =  19"  9"   2*  ) 
Decl.  =     -25°  33  '  \ 

1901.586               306?3               21?32 
.720               306.9               20.97 

1901.50                   12.9               39.07 
The  only  other  measure  is  by  H  : 
1830+        10?6       25'±  :  5-6.  ..17 
There  is  a  13m  star,  158?2  :  43^5. 

1901.65                 306.6               21.14 

Both  components  in  Cord.D.M.  as  Nos.  13881  and 
13879.    H  found  311?5  :  20'  ±  (1837.2). 

H  1376.    8.0  ...  11.2 

H2863.    B.A.C.6590.    6.2  ...  11.7 

RA.    =  19h12m10s  \ 
Decl.  =     -  15=  44'  \ 

1900.458                 16?0               45^96 
.551                 16.6               45.67 

Decl.  =    +  15°  10'  i 

1901.416               121?6               KK16 
.471                123.6                10.14 

1900.50                   16.3               45.81 

H  gives  14?6  :  15'±  6  .  .  .  15  (1830);  "a  third  np 
very  strongly  suspected."    I  could  not  see  any  third 

1901.44                 122.6               10.15 
Hgivesl20?4:6"±(1828). 

OS  366  rej.    7.5  ...  9.2 

RA.   =  19*  9™  48s  ) 
Decl.  =    +  34°    Q'\ 

1901.471               230?2               22^14 
.589               229.6               21.74 

nothing  now.    The  principal  star  has  a  proper  mo- 
tion of  0'293  in  204?7. 

H  266.    10^  ...  10.6 

RA.    =  19"  13"    8s  ) 
Decl.  =          1"  47    \ 

1901.529               266?2               14T57 
.586               265.1                14.55 

1901.53                 229.9               21.94 

Without  change.    The  principal  star  is  L  36242. 
Two  faint  stars  s  and  sf. 

1901.56                 265.6               14.56 

This  is  not  in  the  D.M.,  but  is  closely  /D.M.(-1°) 
3706.    H  has  265°  ±  :  5'±  (1820);  "a  suspected  stel- 

49 


50 


MEASURES  OF  DOUBLE  STARS 


lar  nebula  in  the  field."    The  40-in.  shows  this  as  a 
double  nebula,  with  the  appearance  of  belonging  to 
the  planetary  class.    It  was  rediscovered  by  Marth, 

BandC 

1901.471               236?7               10^48 
.586               239.2               10.46 

and  is  No.  6(78  of  Dreyer. 

2  2494  rej.    7.4  9.5 

R.A.    =  19"13">36S  ) 
Decl.  =    '  -    6°  51'  f 

1900.458                 81U               25f26 
1901.703                 81.2                25.33 

1901.53                 237.9               10.47 

No  other  measures.    The  principal  star  is  D.M. 
(9°)4075. 

S2501 

R.A.   =  19h15'M2s  ) 
Decl.  =       -    4°  58'  \ 

IQAI    Aff>                       OO°  A                     1Q'89 

1901.08                   81.1               25.29 

.455                  21.7                20.05 

There  is  an  error  of  180°  in  the  angle  of  the  only 
other  measure  : 
1848.65        256?2        26^59        In        Mitchell 

S  2500  rej.    D.M.(19°)3976.    8.0  ...  10.5 

R.A.   =  19h'l4mlls  ) 
Decl.  =    +  19°  30'  \ 

1901.416                 24?|3               19^74 
.586                 23.2               20.06 

1901.45                  22.0               19.93 

Without  change.    There  is  a  13.5m  star  from  A. 
108?3  :  9.  '6. 

S  2506  rej.    8.7  ...  9.1 

R.A.    =  19h16m14s  ) 
Decl.  =    +  14°     8'  \ 

1901.589               350?5               16^63 
.720               351.2               16.60 

1901.50                  23.7               19.90 

No  other  measures  except  angle  by  H,  23?0  (1830). 
The  A.G.  proper  motion  of  A.  is  0^062  in  280?2. 
The  6.8m  star,  distant  about  10'sp,  D.M.(19°)3975, 
is  said  to  be  an  Algol  variable,  the  magnitude  de- 
scending to  9m,  with  a  period  of  about  17  days  (A.N. 
3748). 

OS  (App)  180.    L  36460.    7.7  ...  8.0 

R.A.   -  19h15mlls  ) 
Decl.  =    +14°  12'  \ 

1900.684               266?5               80^40 

AO1?                         O££    Q                         OH    Of\ 

1901.65                 350.8               16.61 

Rejected  by  2  as  not  subsequently  found.    Evi- 
dently fixed.    A  is  D.M.(14°)3888.    The  only  meas- 
ures are  : 
1843.60        170?9        16^33        In        Ma 
1875.01        351.3        16.43        2w        J 

» 

Glasenapp.    S.D.(14°)5425.    9.0  ...  9.5 

R.A.    =19"  18-    2s  ) 
Decl.  =      -  14°  52'  \ 

1901.605                 68U               24^33 
1902.449                 66.7                24.28 

.  Do  1                          /DO  .  O                        OU  .  ZU 

1902  03                  67  4               24  30 

1900.68                 266.4               80.30 
The  only  measures  are  : 
1874.98        266?3        80?22        3n        A 

H  884.    7.5  .  .  .  10.9  .  .  .  11.0 

R.A.    =19h15m28=  ) 
Decl.  =    +    9°  36'  \ 

A  and  B 

The  only  other  measures  are  : 
1890.54        69?2        23^99        2n        Glasenapp 

Schjellerup.    8.2  ...  9.2 

R.A.   =  19h19-33s  > 
Decl.  =    +    4~  36'  \ 

1901.589               214?0               4U24 
.720                214.2                41.18 

1901.471               299?  2               45f05 
.586                299.7                44.59 

1901.65                 214.1               41.21 
From  list  of  new  pairs  in  A.N.  1485.    No  other 

1901.53                 299.4               44.82 

measures.    A  is  D.M.(4°)4096. 

50 


S.    W.    BURNHAM 


51 


S  2517  rej.    D.M.(22=)3687.    8.7  ...  9.7 

RA.   =  19h19n'40s 
Decl.  =-  +  22"  32' 

1901.589      138?6      15.'85 
.760      138.5      15.88 


s  i 
'  \ 


1901.67  138.5 

No  other  measures. 

0.  Stone 


15.86 


.    =  19h20m:      ) 
l.  =     -  16°  11'  \ 


RA.    =  19h20m: 
Decl. 


Given  in  Cin5,  195?4  :  4-'84  :  6.8  ...  13  (1880.62) 
In.  I  could  not  find  any  such  pair  in  or  near  this 
place.  There  is  no  bright  star  here  in  the  S.D. 


H  2871.    4  Vulpeculae.    6  . 

RA.   =  19b20»12s  ) 
'  \ 


1901.473 
.512 

1901.49 


Decl.  =    +19'34' 

106?  5 
106.3 


106.4 


11.0 


24-'89 
24.89 

24.89 


H  gives  110?4  :  30" ±  (1830);  "two  more  near;  one 
extraordinarily  faint."  There  is  a  star  of  about  the 
same  magnitude  in  197?9  at  about  double  the  dis- 
tance, and  a  13.5m  star,  more  distant,  in  231 ?4. 


1901.416 
.433 

1901.42 


v  Aquilae 

RA.   =  19"  20-"  23s 
Decl.  =    +   O5     6 

287?9 

288.2 


•I 


200-50 

200.74 


288.0  200.62 

Measured  in  looking  for  9  1^-  34.  which  is  about 
3mf.  B  is  D.M.(0  )4204.  The  proper  motion  of  A  is 
0-'024  in  a59.7  The  A.G.  positions  give  288?6 : 201 -'4. 
Many  small  stars  nearer  A  than  this. 

3  Cygn  i.    6.5  ...  10.4 

RA.    =19"  20"- 28s 
Decl.  =    +24    32 

1900.515  78?3  30-'94 

.553  76.9  30.47 

1901.473       76.2      30.21 


1900.85 


77.1 


30.54 


The  principal  star  has  a  large  proper  motion,  0'658 
in  198?1  (Berlin  A.G.).  The  only  other  measures  are 
by  OS,  the  first  of  which  is : 

1866.72        122?8        27 -'91         In        OS 


?N.  119.    6...  8.2 

RA.   =  19h22m27s  ) 
Decl.  =     -27    14'  \ 


1901.455 
.509 

1901.48 


141?  9 
141.3 

141.6 


7-65 

7.87 

7.76 


No  measures  in  9.  There  is  an  error  of  about 
23'  in  his  Decl.  The  measures  of  this  show  no 
change.  It  was  measured  by  me  in  looking  for  No. 
153  of  the  Harvard  list,  which  has  an  error  of  about 
3m  R.A.  and  10'  in  Decl.  It  is  identical  with  the  $ 
pair. 

H  887.    L  36791.    7.0  ...  13.2 


RA.    =  19  "  22  m  54s  / 
Decl.  =    -    7°  17'  ( 


1900.473 
.476 


348?7 
348.7 


35^54 
35.08 


1900.47  348.7  35.31 

No  other  measures.  H  called  the  small  star  20m. 
The  principal  star  appears  to  be  the  variable  U 
Aquilae. 


9  IV.  33.     9.5  . 

RA.   =19h23nl 
Decl.  =          O3 


..  9.7 

9s  ) 
0'  \ 


1901.433 
.512 


335?7 
335.7 


12-'96 
13.12 


1901.47  335.7  13.04 

9  describes  this  as  "  the  first  of  2  stars  p  v  Aqui- 
lae ;  distance  of  the  two  nearest  21  '98,  inaccurate." 
After  a  very  careful  examination,  I  am  certain  that 
the  star  which  he  calls  v  Aquilae  is  really  the  6.9m 
star,  D.M.(-0  )3760,  which  follows  the  other  2-  47s. 
The  description  then  applies  perfectly  This  faint 
pair  is  not  in  the  D.M.  The  place  given  above  is 
that  of  the  bright  star. 


OS  (App)  182.    6.9  ...  7.4 

RA.   =  19h23m37s  ) 
Decl.  =    +49°  54'  \ 

1901.471      305?6      72^03 
.529      305.8      71.69 


1901.50  305.6 

The  only  other  measures  are  : 
1874.62        307?3        71^79 


71.80 


3u 


51 


52 


MEASURES  OF  DOUBLE  STABS 


There  is  a  14m  star  from  A  113?9  :  12M7  (1901.53) 
In.    There  is  also  a  small  nebula  in  the  field  ;  from 
A  in  the  direction  ot  247°3,  and  from  B  in  221  ?0. 
The  principal  star  is  given  a  proper  motion  of  0'085 
in  54?3. 

A  20.    7  ...  10.1  ...  9.7 

R.A.    =  19"25m    1s  ) 
Decl.  =      -    2°  22'  \ 

A  and  B 
1901.589                  65?  2                  U48 
.760                 68.9                 1.22 

Discovered  by  Howe,  but  the  place  in  Cin5  is  in 
error  in  both  R.A.  and  Decl.    The  only  measures  are 
those  by  him  in  1879,  which  show  no  motion.    The 
principal  star  in  D.M.(3°)4079. 

?  V.  104.    7.3  ...  9.8 

R.A.   =19"30">55S  / 
Decl.  =    +  15°  37'  \ 

1901.433               126°6               39^08 
.436               126.3               38.56 

1901.67                   67.0                 1.35 

.471                125.4                38.82 

A  and  C  (=22535) 
1901.589               298°7               25f98 
.604               297.9               25.94 
.760               298.7               25.90 

1901.45                 126.1               38.82 

The  place  is  a  little  uncertain  in  H.    The  princi- 
pal star  is  D.M.(15°)3877.    The  magnitude  in  D.M. 
is  6.7.    The  only  other  measures,  except  position 

1901.65                 298.4               25.94 
No  material  change. 

H  5128.    8.4  ...  10.1  .  .  .  10.3 

R.A.   =  19h26m36s  ) 
Decl.  =     -  18°  52'  \ 

A  and  B 
1901.589               111?0               20^88 
.604                111.4                21.08 

angle  of  106°3  (1783.65),  are  : 
1893.55        124°9        39^27        In        Bigourdan 

€  Sagittae 

R.A.   =  19  "  31  m  51s  ) 
Decl.  =    +  16°  12'  \ 

1901.433                 81°9               89?78 
.471                 81.3               89.71 

1901.59                 111.2               20.98 

.473                 80.9               89.96 

BandC 
1901.589               125?5                 4^29 
.604               127.1                 4.17 

1901.46                   81.4               89.82 

As  a  wide  pair  this  is  $  VI.  26  =  $  VI.  63  =  §  N. 
83  =  S  721  =  OS  (App)  185.     In  #  VI.  63  the  angle 

1901.59                 126.3                 4.23 

No  other  measures  of  BC  except  an  angle  by  H 
of  125?9  (1836.5).    The  single  measure  of  AB  of  1879 
in  Gin5  shows  no  change.     A  and  B  are  S.D.(18°) 
5413  and  5414. 

Howe.    8.8  .  .  :  10.7  .  .  .  10.1 

R.A.   =  19"  29™  36s  ) 
Decl.  =    +    3°  12'  } 

A  and  B 
1901.589                 23?3                 6^75 
.742                 25.6                  6.81 

is  reversed.    $  N.  83  is  given  3mp  and  11s,  but  it  is 
identical  with  this  star.    The  A.G.  proper  motion  of 
A  is  very  small,  0'013  in  297?5. 

1782.30        81?5        91  '87        In       # 
1800             79.9        87.86                   Lalande 
1870.2          81.1        91.57                   A.G. 
1875.61        81.3        90.68        in       A 

H  1423.    9  Cygni.    6.5  ...  11.2 

R.A.    =19h32ra225  ) 
Decl.  =    +29°     5'  \ 

1901.66                   24.4                 6.78 
A  and  C 

1900.473               127?8               20^85 
.687                129.4                21.15 

1901.589                306?7                32.'50 
.742               305.6               32.29 

1900.58                 128.6               21.00 
Only  H  136°3  •  12"  -+-  (1828)     The  proper  motion 

1901.66                 306.1               32.39 

is  insensible,  0'021  in  158°  5  (Auwers). 

52 


S.    W.    BUBNHAM 


53 


OS  379  rej.    8.0  ...  8.5 

RA.   =19"  33"  55' 
Decl.  =    +33'  38 


') 
'  \ 


1900.703 
1901.260 

1900.98 
Without  change. 


86?4 
86.7 

86.5 


24?97 
24.89 

24.93 


9  II.  32  =  9  N.  84. 

RA.   =  WSi" 
Decl.  =    +  16°  18 

1900.473      300?  9 
.553      301.8 


6.5  ...  8.6 

0') 
8'  \ 


1900.51  301.3 

The  only  measures  are : 

1796.59        301? 8        27-20 
1840.22        302.2        28.61 


28 -'46 
28.57 

28.51 


In        $ 
2»        OZ 


H  2888.    45  Aquilae.    6.5  ...  13.7 


1900.476 
.515 

1900.49 


R.A.   =19"34m 
Decl.  =    -    0° 

354?2 
355.4 


54' 


354.8 


42^89 
42.23 

42.56 


No  observations  except  H,  354?5  :  30'  :  7  ...  19 
(1830).  His  description  is  :  "A  large  star  in  a  con- 
stellation of  at  least  a  dozen  small  ones  within  2' 
distance;  that  taken  forms  with  the  large  star  a  good 
representation  of  the  Georgium  Sidus  and  one  of  its 
satellites.  It  is  a  fair  comparison  in  point  of  light." 


0.  Stone 

RA.   =  19"  35™  : 
Decl.  =    +37°  55' 

The  measures  in  Cin5  are  224?1  :  5^06  :  9.5  ...  11.0 
(1879.61)  \n.  I  could  not  find  anything  in  this 
vicinity  to  correspond  with  the  description,  though 
there  are  many  faint  pairs.  One  near  this  place  is 
64?7:  7-'54. 

S  2560  rej.    L  37406-    7.2  ...  95 

R.A.    =  19h35ra34s 
Decl.  =    +  23    26' 


1901.605 
.760 


295?0 
295.1 


1901.68  295.0 

No  other  measures. 


15^12 
15.48 

15.30 


H  895.    8.7  ...  10.5  ...  9.1 

RA.    =  19" 36°- 46s  ) 
Decl.  =    +   0°  58'  \ 

A  and  B 

1901.433      209?0  14?17 

.473      205.8  13.99 

.512      208.3  14.39 


1901.47 

1901.433 
.473 
.512 

1901.47        16.8      28.53 

C  and  D  (new).  C  =  13.7 
1901.433      125?1       4^66 
.512      123.3       4.52 


207.7 

AandC 

17?5 

16.4 

16.6 


14.18 

28'50 
28.65 
28.43 


1901.47       124.2       4.59 

No    measures  by  H.     He  saw  only  the    three 
brighter  stars.    A  and  C  are  D.M.(0°)4283  and  4284. 


OS  381  rej.    7.2  ...  11.7 

RA.   =  19"  37™  23s 
Decl.  =    +   3°  53 

1900.476  5? 7  15?04 

.515  6.5  15.16 

.551  5.7  15.20 


s  > 
'  J 


1900.51 
Unchanged. 


6.0  15.13 


W  XIX.  944 

RA.    =  19h37m56s 
Decl.  =    +    4=  28 

Noted  "duplex"  in  Weisse.  It  is  not  double, 
although  there  are  several  stars  in  the  field.  The 
7Jm  star  «/  has  a  25'  companion  p.  In  the  D.M. 
the  Weisse  star  is  (4=)4205,  and  a  9.3m  star,  No.  4208, 
is  26*5/  and  2'2w.  The  difference  in  R.A.  is  now 
much  less. 


OS  (App)  190.    12.  ...  12  ...  8.1 

s) 

"i 


RA.   =19"  39-  50s 
Decl.  =    +46'  57 

A  and  B 


1901.471 
.509 

1901.49 


299?4 
298.8 

299.1 


1U82 
11.66 

117.4 


53 


54 


MEASURES  OF  DOUBLE  STARS 


AandC 

1901.471               316?2               67^51 
.509               316.3               67.56 

S  2581  rej.    8.0  ...  9.6 

R.A.   =  19"  43"-    8s  ) 
Decl.  =    -  11°  42'  ) 

1901.49                 316.2               67.53 

The  faint  star  was  added  with  the  18|-in.    No 
change. 

1901.455               282?6               38  .'00 
.473               282.7               38.35 
.531               282.2               38.37 

1878.40        300?2        1U64        In        p 
1875.66        316.5        67.66        3n        J 

HN.  113 

R.A.    =  19"  40™        > 
Decl.  =    +37°  15'  <j 

H  has  no  measures  ;  it  is  given  as  Class  II,  with 
the  above  place.    There  is  no  double  star  here,  and 
there  is  little  doubt  of  his  observation  belonging  to 
S  2578,  which  is  in  the  same  vicinity  nf.    In  the 
course  of  this  search  I  ran  on  to  OS  384,  and  meas- 
ured it  once  ;  192?7  :  0'98  (1901.47). 

1901.48                 282.5               38.24 

The  principal  star  is  P  XIX.  1058.    The  observa- 
tion in  Mitchell  belongs  to  some  other  pair.    The 
only  measure  is  : 

1879.54        281?3        37^88        3n        Cin 

Jacob.    9.0  ...  9.1 

R.A.    =  19»43m59s  ) 
Decl.  =     -  11°    5'  \ 

1901.455               320?0               28'66 
.473               319.0               28.60 
.531               319.0               29.00 

H898 

R.A.    =  19"  41  m  55s  ) 
Decl.  =    +31°  24'  \ 

Described  by  H  as  a  faint  triple,  all  llm,  225°  ±  : 
2"±  AB;  225°±  :  6"±  AC.    Very  carefully  looked  for 
twice,  but  nothing  of  this  kind  found.    There  are 
many  faint  pairs  in  the  vicinity,  but  not  of  the  de- 
scription given. 

Ho  114 

R.A.   =  19"  41™  59=) 
Decl.  =    +  32°  36'  f 

1901.49                 319.3               28.75 

The  components  are  S.D.(11°)5146  and  5147.   The 
only  other  measures  are  : 

1845.8        319?7        30^80        Jacob 

Hussey  in  1899  found  A  to  be  a  close  and  unequal 
pair  (=  Hu  77).   The  seeing  was  too  poor  to  measure 
AB.    This  triple  is  12'p  51  Aquilae. 

Ho  275.    51  Aquilae.    5  ...  12.9 

R.A.    =  19h44mlls  ) 
Decl.  =     -  11°     4'  J 

1901.531               117?5               20^83 
.586                116.2                20.94 

A  and  B.    7.2  ...  13.5 
1901.529               233?7                 3-15 
A  and  C  (new).    C  =  14 
1901.529               215?  4                 9^72 
A  and  D.    D  =  8.2 

1901.471               200?2               3K36 
.509               200.4               31.49 
.529               200.7               31.47 

1901.56                 116.8               20.88 

The  increase  in  the  distance  since  the  measures  of 
Hough  agrees  with  the  proper  motion  of  A,  0'08  in 
315?5. 

H  603.    19  Cygni.    6  ...  9.8  ...  11.7 

R.A.    =  19h46m  19s  \ 
Decl.  =    +  38°  25'  \ 

1901.50                 200.4               31.44 

AD  is  H  N.  110  =  S  726  =  OS  (App)  192.     The 
faint  star  C  has  not  been  seen  before.    There  is  no 

A  and  B 

1901.605                103?  7                54f29 
1902.433                103.9                54.16 

material  change  in  the  other  stars. 

1902.02                 103.8               54.22 

54 


S.    W.    BUBNHAM 


55 


BandC 

1901.605                 12?0               2U60 
1902.433                 13.7               21.99 

9  III.  105  =  S  2595  rej.    9.4  ...  9.7 

R.A.    =  19"  47™  55s  / 
Decl.  =    +  19°  59'  \ 

1902.02                  12.8              21.79 
Positions  estimated  by  H  ;  he  calls  C  18m.    The 

1901.436               215?5               16^38 
.589               214.2               16.34 

large  star  has  a  proper  motion  of  0'112  in  3?6. 
1887.81        102?1        53^92        2n        Engelhardt 

H  900.    56  Aquilae.    6  ...  11.5 

RA.   =  19"  47-  37s  [ 
Decl.  =      -    8°  53'  \ 

1901.473                 76?  9               46^33 
.531                 77.9               46.55 

1901.51                 214.8               16.36 

There  is  a  10m  star  37?0  :  24  '0.    The  other  meas- 
ures are  : 

1783.45        219?  6        14^48        In        $ 
1881.39        214.9        16.31        3n        ft 

Evidently  fixed.    A  is  D.M.(19°)4192. 
02  390. 

1901.50                  76.4              46.44 

No  measures  in  H.    Unchanged  since  my  meas- 
ures in  1880. 

2  2593  rej.    8.3  ...  9.7  ...  11.0 

R.A.    =  19M7m37s) 
Decl.  =    +  11°  32'  \ 

AandB 

1901.436              236?2              12^34 
.452               235.8               12.53 
.529               235.6               12.27 

R.A.   =  19h50m19s  | 
Decl.  =    +29°  53'  \ 

A  and  B 
1901.531                 22?2                 9^40 
A  and  C 
1901.531               175?5               16^15 
Without  change. 

H  1458.    8.8  ...  8.8 

RA.    =  19h54m22s  ) 
Decl.  =    +10'  51'  \ 

1901.47                 235.9               12.38 
B  and  C  (new) 
1901.436               301?8                 3^85 

1901.436               132?5               16^52 
.452               134.8               16.32 
.529               133.3               16.06 

.452               307.4                 3.52 
.529               303.7                 3.72 

1901.47                 133.5               16.30 
The  components  are  D.M.(10°)4132  and  4133.  The 

1901.47                 304.3                 3.70 

No  other  measures,  except  Leipsic  A.G.,  237°0  : 
12fl2  (1893.54).    A  is  D.M.(11°)4030. 

Wilson.    Cord.D.M.(24°)15677.    9  .  .  .  10.4 

R.A.    =  19"  47-"  46s  ) 
Decl.  =    -  24°  10'  \ 

1901.605               116?1               ll'.Yl 
1902.433               116.5               17.32 

only  complete  measure  is  : 
1875.11        133?7        16-'04        2n        4 

9  I.  93.    L  38205.    8.0  ...  8.6 

RA.   =  19h55m30s  > 
Decl.  -      -    0°  32    $ 

1900.458               293?0                 2^14 
1901.433               298.9                 2.07 
.436               299.7                 2.14 
.452               294.2                 1.97 

1902.02                116.3              17.24 
Identified  as  above.    The  only  measure  is  : 
1885.71         117?6        17T34        In        H.C.Wilson 

1901.19                 296.4                 2.08 

The  change,  if  any,  is  a  small  increase  in  the 
angle.    There  is  a  11.5m  star,  2?2  :  26-'6. 

55 


56 


MEASURES  OF  DOUBLE  STARS 


22612 

R.A.   =  19h55m31s) 
Decl.  =    +    6"  36'  \ 

1901.452                 53?3               38-'97 
.471                 53.7               38.69 

H  1470.    D.M.(37°)3744.    7.0  ...  9.1 

R.A.   =  19»59m195  ) 
Decl.  =    +37°  59'  \ 

1901.605               337?2               29^18 
1902.449               337.2               28.94 

.529                 53.6               39.05 

1902.02                 337.2               29.06 

1901.48                   53.5               38.90 

The  distance  is  slowly  increasing  from  proper 
motion,   the  angle   remaining   constant.     S    found 
36  '59(1827  .67).    These  stars  point  to  a  3"  or  4"  pair 
of  12.5m  stars  about  30"  from  B. 

Harvard  Zones.    8.6  ...  13.0  .  .  .  11.5 

R.A.   =19h57ra   6s) 
Decl.  =    +   0°  22'  f 

A  and  B 
1900.458               145?  2                 4f39 
1901.433               146.1                 4.05 

This  is  H  605,  the  Decl.  of  which  is  uncertain  in 
H.    The  companion  is  D.M.(37°)2743.    The  colors, 
red  and  green,  are  well  marked.    There  is  probably 
a  misprint  in  the  distance  by  Secchi,  335?2  :  23  '83 
(1856.63)  In. 

26  Cygni.    6  ...  8.3  ...  12.2 

R.A.   =  19h57m58s  ) 
Decl.  =    +  49°  46'  \ 

AandB 
1898.463               147?4               41  .'98 
.518               147.1               41.87 
520               146  8               42  03 

i  onn  QA                   I/IK  <?                   A  *» 

iyuu.y4                 14O.D                  \  .  -Z. 
AandC 
1900.458               189?  7               16  '24 
1901.433               190.5               16.90 

1898.50                 147.1               41.96 
BandC 
1898.463                 74?  7                 8^74 
520                 75  0                 9  30 

i  onn  QA                   i  on  i                 i  tz  X.H 

lyuu.ya                 iyu.1               lo.oi 

No  other  measures.    The  description  in  H.Z.  is 
s/:4"±  :  8-9...  15. 

1898.49                   74.8                 9.02 
B  and  D  (new).    D  =  13.7 
1898.463               257?2               HK26 
.520               257.9                 9.94 

S  2619 

R.A.    =  19h57m29s  ) 
Decl.  =    +  47°  56'  \ 

A  and  B  (=22619) 
1901.320               242?0                 4^31 
1902.433               244.8                 4.10 

1898.49                 257.5               10.10 

The  bright  stars  make  f  V.  47  =  H  VI.  60  =  OS 
(App)  197.    C  was  added  with  the  18J-in.  in  1878. 
So  far  no  sensible  change  in  AB. 

1901.87                 243.4                 4.20 
A  and  C 
1901.318               305?  0               17  .'73 
.320               303.8               17.35 
1902.433               304.2               17.42 

H  2927.    7.5  ...  12  ...  13.2 

R.A.   =  19h59m13s  / 
Decl.  =    +    0°     T  \ 

A  and  B 
1901.433               125?3               24^14 

1901.69                 304.3               17.50 
C  and  D 

.471               126.2               24.44 
.512               123.5               24.43 

1901.320               179?5                 5-'12 
1902.433               181.8                 5.98 

1901.47                 125.0               24.34 
B  and  C  (new) 

1901.87                 180.6                 5.55 

No  change  in  AB.    C  and  D  are  not  in  S.    C  was 
iirst  noted  by  H  and  D  added  by  OS  in  1854     The 

1901.433               185?7                 4^82 
.471               186.2                 4.94 
.512               184.0                 4.77 

only  measures  of  CD  are  : 
1879.49        183?8        5M5        In        ft 

1901.47                 185.3                 4.84 
No  complete  measures.    H  gives  135?0  (1830). 

56 


S.    W.    BUBXHAM 


57 


OS  397  rej.=  Tl  V.  105.    7.3  ...  8.5 

RA.    =  19"  SO-  16*) 
Decl.  =    +  15°  33'  j 

1900.647               173.1               37^70 
.687               173.4               37.86 

Herschel's  place  is  that  of  0  Aquilae  ;  but  in  the 
original  Catalogue  (Phil.  Trans.  1782)  it  is  described 
"  a  star  north  of  6  ;  distance  about  1  ,"  and  it  is  not 
probable  that  the  star  measured  above  is  the  right 
one.     Most  likely  it  is  the  8m  star,  L  38760,  which 
is  2™  431/  6  and  4  'Is.    I  have  measured  the  compo- 

1900.66               173.2              37.78 
Slow  change  from  proper  motion. 

nents  of  this  (7.1  .  .  .  8.5)  as  follows  : 

1901.512                 80?  5               64^09 
.586                 80.3               64.05 

OS  (App)  198 

RA.   =  20"  Om  17s  ) 
Decl.  =    +    7°  13'  \ 

A  and  6 
1901.531               174?0               37^17 
.742               173.9               37.41 

1901.55                   80.4               64.07 
This  star  has  a  proper  motion  of  0'262  in  203?6. 

9  VI.  92.    8.1  ...  9.0 

RA.   =  20"  5m    9s  ) 
Decl   —    —  125  26  '  \ 

1901.63                 173.9               37.29 
A  and  C 
1901.531               186?  2               64^91 
.703               186.0               65.27 

1900.512               265?4               84-'96 
.515               265.4            .  85.91 
.551               265.3               85.00 
1901.589               264.9               85.  U 

.742               186.0               65.11 

1900.79                 265.2               85.25 

1901.66                186.1              65.10 
No  other  measures  of  B,  which  was  first  noted 
with  the  18i-in.    No  change  in  AC  since  the  meas- 
ures of  J. 

H  1477.    L  38450.    8.0  ...  10.6 

RA.   =20"  0-55S  ) 
Decl.  =    +12=  20'  \ 

1901.531              271?4              20.'16 
.720               270.6               19.93 

The  components  are  S.D.(12°)5663  and  5662.   The 
only  measures  are  : 
1783.18        267?9        62-'27        In        f 
1879.63        265.8        51.35        In        Cin 
An  examination  of  Cin5  shows  that  there  is  an 
error  of  10  revolutions  in  reading  one  head,  and  that 
the  observed  distance  was  85  -'53  instead  of  51  -'35. 

8735  =  ?V.  136.    7.5...  7.7 

1901.62                 271.0               20.04 
Only  H,  265?0  :  12'  ±  (1828). 

.     RA.    —  20"   5m    9s  / 
Decl.  =      -    0=  29'  J 

1901.605               206?3               55^25 
.703               206.1               55.48 

9  IV.  34.    9.0  ...  9.4 

R.A.   =20"  I"  26') 
Decl.  =      -    0'  57'  J 

1901.509               197?8               47  .'48 
.512               198.1               47.58 

1901.65                 206.2               55.36 
Only  one  measure    since  1825,  but  apparently 
without  change. 

S*?Affc       nV  (  J  nn  I  OffcO        7  Q            7  A 

1901.51                 197.9               47.53 
The  correct  place  is  given  above.    A  is  D.M.(—  1°) 
3896.  No  other  measures.   fl[  estimated  distance  30". 

9  VI.  27.    0  Aquilae.    3  ...  13.0 

<4U  —  U^i  (^ipp)  6\}&.       (.0  ...   (.4 

RA.    =  20"   8m  18s  ) 
Decl.  =    +    6'  H    \ 

1901.529               192?  8               42^96 
.703               193.0               43.36 
.720               192.6               43.22 

RA.   =  20»  5m    7s  ) 
Decl.  =      •    V  11'  \ 

1901.512               260?0             113^95 
.586               259.9             113.47 

1901.65                 192.8               43.18 

A  comparison  with  the  measures  of  S  and  ^  shows 
that  these  stars  are  relatively  fixed.    They  have  a 
common  proper  motion  of  0'197  in  236?1  (Bossert). 

1901.55                 260.0             113.71 

The  components  are  D.M.(6C)4480  and  4479. 

57 


58 


MEASURES  OF  DOUBLE  STABS 


D.M.(0°)4453.    9.0  ...  10.5  ...  10 

R.A.    =20"   9™  15s) 
Decl.  =    +   0°  20'  \ 

A  and  B 
1901.799               256?  8                 I'lO 

5  K.  138.    S.D.(17°)5954.    8.0  ...  8.6 

R.A.   =20h15m23s  ) 
Decl.  =    -17°    9'  \ 

.     1901.455               331?  2                 3^07 
.742               331.5                 3.09 

190/.471                 ^58.  »                   l.oo 

1901.60                 331.3                 3.08 

1902.13                 257.8                 1.79 
A  and  C 
1901.799               270?6               3U48 
1902.471               270.7               31.30 

No  measures  by  9-    Unchanged  since  my  meas- 
ures of  1878.    The  first  mention  of  this  pair  after  $ 
is  by  Peters,  who  found  it  in  observing  an  asteroid 
(A.N.  1635). 

1902.13                 270.6               31.39 

Noted  as  double  in  the  Harvard  Zones.    The  only 
other  measures  are  : 
AB        1879.46        259?2          U2±        In        Cin 
AC        1879.46        276.8        31.17          In        Cin 

H.  C.  Wilson.    9.5  ...  9.5 

R.A.   =20"  17™  33s) 
Decl.  =    +   5C  12'  \ 

1901.531               359?  8                 2?  14 
.720               360.2                 2.05 

<r  Capricorni.    Sh  380  =•  $  V.  87 

R.A.   =  20h12m28s  ) 
Decl.  =    -  19°  30'  $ 

1901.605               178?0               55^90 
.742               177.5               55.90 

1901.62                 360.0                 2.09 

Discovered    by  Wilson.     The    correct    place  is 
given  above.     It  is  D.M.(5°)4496.    The  only  meas- 
ures are  : 

1893.39        359?7        U80        3n        Wilson 

1901.67                 177.7               55.90 
No  change  since  my  measures  in  1881. 

v  Capricorni.    .  .  .11.0 

R.A.   =  20h14ra   0»  ) 
Decl.  =     -  13°     8'  \ 

1901.605               210?  8               54^14 

S749 

R.A.   =  20"  21-  14  »  ) 
Decl.  =      -    2"  30'  \ 

1901.608               189?  8               60^00 
.720               189.6               59.57 
.742               189.6               59.85 

.742                210.5                53.98 

1901.69                 189.7               59.81 

1901.67                 210.6               54.06 
The  only  measures  are  : 
1836               28?0        56^33        In        Lamont 
1877.77        210.1        55.38        In        ft 

H  2953.    D.M.(8°)4408.    8.7  ...  10.7 

R.A.    =  20»15m16s  > 
Decl.  =    +   8°  14'  | 

1900.706               260?2               25?  19 
1901.395               261.7               25.52 

No  change  since  my  measures  in  1880,  and  the 
measures  of  S^agree  with  the  last.    Bossert  gives  the 
proper  motion  of  A  0^161  in  248?2,  and  B  0^183  in 
244?  1.    The  measures  show  no  relative  motion. 

p  363 

RA.    =20"24m28s  ) 
Decl.  =    +20°  12'  \ 

AandB 
1900.438                 64?1               18^70 

1901.05                 260.9               25.35 
Only  observed  by  H,  260?4  :  18"  •+-  :  9  .  .  .  16  (1830)  ; 

.703                 65.2               18.74 
.706                 64.5               19.14 

'  delicate  and  difficult." 

1900.61                   64.6               18.86 

58 


S.    W.    BCBXHAM 


59 


AandC 

1900.438               198?4               44?22 
.703               199.0               44.58 

S2708 

RA.   =20h34m    7s) 
Decl.  =    +  38°  13'  \ 

1900.62                 198.7               44.40 

These  measures  indicate  that  the  change  in  AB  is 
due  to  the  movement  of  the  11  5m  star  B  and  not 

A  and  C 
1901.318               330?0               27^73 
.320               329.9               27.59 

the  7m  star  A. 

S  N.  7.    10.0  .  .  .  10.5  .  .  .  103 

HA.    =20h26»31s:  ) 
Decl.  =   -  26°    9   :  \ 

1901.608           340?7            14-'84           AB 
.608           226.7            20.04           AC 

Given  by  $  Class  I-II;  "very  close  triple;  vertex 
/."    This  is  the  only  object  I  could  find  answering 
the    description.     The    places    are  practically   the 
same.    There  is  a  13m  star  150°0  :  15  -'3  from  A. 

22696 

1901.32                 330.0               27.66 
A  and  B 
1901.320                 20?3               15^39 

The  13.5m  star  B  was  added  by  Hall  with  the 
26-in.    The  principal  star  has  a  proper  motion  of 
0?242  in  138?7,  and  it  is  well  known  that  the  change 
in  C  since  2  corresponds  to  this   movement.    The 
other  companion  was  measured  to  see  whether  that 
showed  the  same  displacement.    From  a  comparison 
of  my  position  with  that  of  Hall  in  1878  it  appears 
that  B  is  fixed  in  space  like  the  other. 

?1V.  78  =  22712  rej.    8  .  .  .  11.9 

RA.    =20"  34"  25s  ) 
Decl.  =    +62°     1'  \ 

1901.608               124?3               28?92 
.758               124.8               28.72 

R.A.    —  20  h  27  m  34  s  ) 
Decl.  =    +   5"     2'  \ 

A  and  B 

1901.742               305?7                 0?84 
.760               307.3                 0.70 

1901.68                 124.5               28.82 
The  only  observation  is  : 
1783.22        49?4        19-'53        In        H 
There  is  no  star  in  this  place.     In  the  notation 

1901.75                 306.5                 0.77 
AB  and  C 

1901.742               348?5               13-'73 
.760               349.0               13.83 

then  in  use  this  angle  corresponds  to  40-6n_f.    If  it 
is  read  sf,  the  angle  would  be  130?6.    The  principal 
star  is  D.M.(6r)2039. 

W2  TTJf    1  1  R8 

1901.75                 348.7               13.78 

The  14m  star,  C,  was  noted  by  me  with  the  18i-in. 
some  twenty  years  ago.    No  other  measures  of  it. 
No  material  change  in  AB. 

I,  2697  rej.    7.5  ...  9.5 

RA.   =20"  28"  13s) 
Decl.  zz      -    0°  53'  I 

1901.720                   1?8               30-'25 
.760                   1.8               30.59 

RA.   =20h35»    1«  ) 
Decl.  =    +37=  58'  \ 

In  Weisse,  "duplex;  comes  ad  boream."    This 
star  has  no  companion.     The  description  applies  to 
S  2708,  which  is  near  by. 

H  2988.    D.M.(2°)4227.    8.5  ...  9.6 

RA.    =20"  35"  52s  ) 
Decl.  =    +    2    32'  \ 

1901.512               138?  9               24^65 
.529               138.3               24.65 

1901.74                     1.8               30.42 
The  only  other  measure  is  : 
1848.67        1?7        32^10        In        Mitchell 

1901.52                 138.6,              24.65 

H  says,  "  large  star  very  red."    It  did  not  appear 
so  on  this  occasion,  nor  when  examined  by  me  in 
1876.     139?7:20'±  :  (1830). 

59 


60 


MEASURES  OF  DOUBLE  STARS 


P  673 
R.A.    =20"36'"295  / 
Decl.  =    +  20°  17'  \ 

A  and  B 

B  and  C 
1901.260                  6?0                 4?98 
.318                  9.3                 4.83 
.320                    7.0                 4.83 

1900.438               297?8                 3?51 
1901.799               296.6                 3.83 

1901.30                    7.4                4.88 
At  this  time  there  were  no  measures  of  these  stars 

1901.11                 297.2                 3.67 
AandC 
1900.438        165?3        105^8        Single  dist. 
1901.799        165.0        105.62 

published. 

T|  Cephei.    3.5  ...  11 
R.A.    =  20»42m51s  / 

"Ra^l     -         _L  A1  °    99'    f 

1901.11          165.1        105.71 

nV  4.1  1        78            1O  Q 

1900.684                 38?8               85^18 
.744                 38.5               85.30 

R.A.   =20"  38°-  17s) 
Decl.  =    +45'  24'  \ 

1901.531               314°  2               17r03 
.608               311.6               16.19 

1900.71                    38.6                85.24 
The  only  previous  measures  are  : 
1879.35        33?8        100  '54        2n        p 
The  large  star  has  a  proper  motion  of  0'816  in 

1901.57                 312.9               16.61 
Rectilinear  motion. 

H  2994.     17  Capricorni. 

R.A.   =  20"  39™  12'  ) 
Decl.  =     -  21°  57'  \ 

Herschel  gives  338?7  :  20"  ±  :  6  .  .  .  18  (1830);  "re- 
quires  verification."     I   examined  this  star  several 
times  with  the  18J-in.  in  1877  under  favorable  condi- 

6? 7,  and  the  computed  place  of  the  companion  from 
this  movement  and  the  measures  of  1879  is  39?  1  : 
85  '61.    The  small  star  is  therefore  not  moving  with 
the  other. 

H  1381.    55  Cygni.    6  ...  10.8 

R.A.    =  20»44m50s  ) 
Decl.  =    +  45°  40'  \ 

1901.531               174?0               20^70 
.608                173.8                20.74 

tions  without  finding  any  companion;  and  on  two 
nights  was  unsuccessful  with  the  40-in.     It  is  safe  to 
say  the  suspected  companion  has  no  existence. 

Skinner.    8.8  ...  8.8 

R.A.    =20"39m46s  ) 
Decl.  =     -  17°     8'  \ 

1900.515               299?8                 3f43 
1901.471               297.9                 3.66 
.531              ,299.1                 3.60 

1901.57                 173.9               20.72 
Without  change. 
1875.11        174?0        20f49        2n        A 

H  3004.    10.9  .  .  .  10.9 

R.A.    =20h46"'15s  ) 
Decl.  =    +62°     5'  \ 

1901.531               197?7                 3^74 

.758                197.8                  3.88 

1901.17                 298.9                 3.56 

From  a  list  of  doubles  furnished  me  several  years 
ago  by  Professor  Skinner,  of  the  Naval  Observatory, 
noted  by  him  in  his  meridian  work.    It  has  since 
been  catalogued  by  Innes. 

OS  412  rej     7.3  ...  10.9  ...  109 

1901.64                 197.7                 3.81 

This  is  in  the  field  p  the  8m  star,  D.M.(61°)2057. 
The  only  observations  are  193?5  :  !£"  :  13  =  13  (1830). 

O.Arg.N.  21247.    8.7  ...  8.8 
R.A.   =20"48m    2!  ) 

R.A.   =20  Ml"1    1s  I 
Decl.  =    +50'  14'  \ 

A  and  B 

Decl.  =    +  53°  36'  \ 

1901.531               184?3                 9^64 
.608                183.5                  9.53 

1901.260               280?  3               25?21 
.318               281.5               25.32 
.320               281.1               25.27 

1901.57                 183.9                 9.58 

"Duplex"  in  O.Arg.    No  other  measures.    The 
components  are  reddish  :  greenish.    Other  compan- 

1901.30                281.0               25.27 

ions  more  distant. 

60 


S.    W.    BfBNHAM 


61 


H5514 

RA.   =20"  49™  31s 
Decl.  =      -    5°  31' 

Described  by  H,  200==b  :  7'±  AB;  70°  ±  :  12*± 
AC,  all  small  stars.  There  is  a  faint  triple  of  llm 
stars  near  this  place,  but  the  angles  do  not  corre- 
spond. Glasenapp  was  unable  to  find  it. 

OS  421  rej.    8.0  ...  93 

RA.    =20"  SO- 47s 
Decl.  =    +31°  43' 

1901.531  192?6  36 '73 

Hussey  measures  a  12.5  star,  77?5  :  30*57  (1898.58). 


Howe.    L  40496.    6.8  ... 

R.A.   =  20h51m  2s) 
i'  r 


Decl.  = 


1901.529 
.531 


0= 

71?7 
72.0 


0 


11 


26*30 
26.25 

26.27 


1901.53  71.8 

The  other  measures  are  : 

1879.50        71?8        26*19        2n        Cm5 

The  principal  star  has  a  considerable  proper  mo- 
tion, but  the  authorities  differ  as  to  the  amount; 
O.*109  in  204?2  (Bossert);  0*075  in  180°  A.G.  The 
stars  seem  to  be  moving  together. 


D.M.(0=)4621.    8.8  ...  12.7  . 

RA.   =20h51m21'  ) 
Decl.  =    +   0°    8'  \ 

A  and  B 

1901.529  335? 7 

.531  334.1 


9.0 


11*44 
11.36 


1901.53 

1901.529 
.531 

1901.53 


334.9 

A  and  C 

138?6 

138.7 


138.6 


11.40 

41*25 
41.38 

41.31 


In  the  Harvard  Zones,  "double,  comp. /."    The 
only  measure  is : 

"  1879.50        137?4        41-*76        2n        Cin5 


1-1 


H  3006.    D.M.(2?)4285.    9.7 

RA.   =20h54m51s 
Decl.  =    +   2C  29' 

1900.551      292?9 

1901.455      289.8 

.512      293.2 


1901.17 


292.0 


.9.7 


1*73 
1.53 
1.72 

1.66 


The  prior  observations  are  : 
1830  300  =  ±        0^5 

1878.17        291.0          1.81 


L  40682.    6  ...  8.8 

RA.    =20h54m58s 
+  18°  52 


In 

2n 


Decl.  = 


•f 


1901.531 
.720 
.739 


333?3 
333.5 
333.4 


45*92 
45.49 
45.63 


1901.66  333.4  45.68 

Both  stars  in  D.M.    The  only  measure  is  : 
1880.63        332?7        44*66        2n        ft 

D.M.(0')4644 

RA.    =20h56m24! 
Decl.  =    +   0°  10' 

Described  in  the  Harvard  Zones,  sp  :  3 '  ±  :  9 ...  12. 
There  is  no  companion  of  any  kind,  and  nothing  as 
described  near  this  place. 


H  1606.    D.M.(5302533.  8.8  ...  9.7 

RA.   =20"  57 
Decl.  =    +  54 

1901.531      186?  4  18*33 

.608      185.6  18.51 

.739      185.9  18.34 


5*> 
A'J 


1901.62  186.0 

H  gives  185?1  :  12  "±  (1828). 
nebula  in  the  field. 


18.39 
There  is  a  fine 


H  1608.     7.4  ...  10.7 

RA.    =20" 59"    9s  ( 
Decl.  =    +  11°  58'  \ 

1901.509      257?9      19*41 
.586      257.3      19.73 


1901.54 


257.6 


19.57 


The  measures  at  Cin  in  1879  show  no  change. 
Many  stars  in  the  field. 


H  274.    10.6  .  .  .  11.0 

RA.   =21»  Im20s 
Decl.  =    +11°  24' 

1901.586  91U 

.589  91.9 


9*46 
9.52 


1901.58  91.5  9.49 

Not  in  D.M.,  but  closely  /D.M.(11  >4483.    H  found 
93°±  :5'±  :9.  .  .  10(1820). 


61 


62 


MEASUKES  OF  DOUBLE  STARS 


H  3009.    x  Capricorni.    6  ...  11  ...  12.2 

R.A.   =21"   Im41s  t 
Decl.  =    -  21°  41'  \ 

A  and  B 
1900.687                 66?0               67^17 
.742                 66.2               66.82 

Noted  as  double  in  the  Harvard  Zones.    This  is 
D.M.(0°)4674.    Only  measured  as  follows  : 
1877.06        318?3        Of72        Bn        A 

S  779.    L  41086.    7.5  ...  8.5 
R.A.   =21"  4m265  ) 

1900.71                   66.1               67.00 
BandC 
1900.687                 89?3               18^17 

Decl.  =    +38°  14'  \ 

1900.725               10?  3               112^77 
1901.260               10.5               112.37 

.742                 89.5               18.33 

1900.99                 10.4               112.57 

1900.71                   89.4               18.25 

The  proper  motion  is  small,  0  '053  in  186?0.    There 
is  a  15m  star  110?9  :  39'2  from  A.     H  gives  68?5  : 
70"  ±;  90°  ±  :  10"  ±(1830). 

OS  527 

R.A.   =21"   2">    1s  ) 
Decl.  =    +    4°  40'  \ 

1900.551               272?3                 0-'46 

There  are  two  or  three  faint  stars  between,  and 
many  in  the  field.    The  only  other  measures  are  : 
1824.81        10?8        114^78        2n        South 

S  2778.    8.5  ...  10.5 

R.A.   =21"  9ra28'  / 
Decl.  =      •    1°  44'  \ 

1900.551               273?3               19^63 
.553               273.0               19.90 

.553               266.7                 0.41 

1900.55                 273.1               19.76 

1900.55                 269.5                 0.43 

H  3011.    D.M.(5°)4707.    8.2  ...  14.5 

RA.   =21"   2m    1s  ) 
Decl.  =    +    5°  10'  \ 

1900.703               232?6               17^08 
.706               232.8               17.39 

S's  distance  in  1828  of  21  '19  seems  to  be  too  large. 
1865.33        269?9        20^21        5n        J 
1880.72        271.2        19.91        2n        ft 

H5516 

R.A.   =21h10m    ±  ) 
Decl.  =    +    2°  29'  \ 

1900.70                 232.7               17.23 

The  principal-  star  has  a  proper  motion  of  0'170 
in  206?0  (Porter).    The  only  measure  is  :  255?4  :  20"  ± 
(1830).     There  is  a  6'3  pair  of  lira  stars  from  A, 
269°  :  148". 

OS  428  rfj.    7.9  ...  9.7 

R.A.   =  21h   3ra    1s  ) 
Decl.  =    +    6"  10'  \ 

1901.531               256?  5               24^11 
.586               256.1               24.21 

Described  by  H,  "quadruple;  all  in  a  line,"  the 
principal  star  9m  and  the  others   18m   and  20m. 
This  place  was  carefully  swept  over,  but  nothing 
found  which  seemed  to  answer  the  description. 

A.G.C.  13.    r  Cygni 

R.A.    =21h10m    0s  ) 
Decl.  =    +37°  32'  \ 

1897.689               324?6                 0^94 
1898.345               322.2                 0.78 
.482               322.1                 0.86 

1901.56                 256.3               24.16 
Without  change. 

Harvard  Zones.    8.9  ...  9.2 

R.A.   =21"   4™    0s  J 
Decl.  -    +    0°  49'  i 

1901.531               318?7                 0.'94 
.586               315.1                 0.79 

1898.17                 323.0                 0.86 

P  163 

R.A.    =21"12m47s  { 

Decl.  =    +11°     4'  \ 

1900.782                   9U                82f41 
1901.471                   9.5               82.55 
.512                   9.3               82.35 

1901.56                 316.9                 0.86 

1901.25                    9.3               82.44 

62 


S.    W.    BURNHAM 


63 


I  have  measured  this  10.9m  distant  star  for  the 
purpose  of  having  hereafter  an  independent  value  of 
the  proper  motion  of  AB. 

H  5265.    9.6  ...  10.1 
RA.   =21"  15-  10') 
Decl.  =    -  22°  53'  J 

1901.589               191?  9               31^68 
.758               193.7               31.56 

No  other  measures  since  1824. 
1824.78        83?5        36  .'78        2n        South 

The  components  are  L  41562  and  L  41563.    The 
change  in  distance  is  supported  by  the  meridian 
positions,  which    give,  Lalande    37^25  (1800)  and 
Lament  39  .'35  (1850). 

H  5517.     18  Aquarii 

1901.67                 192.8               31.62 
The  principal  star  is  Cord.D.M.(22015347.    This 
pair  was  put  on  the  list  to  see  if  the  apparent  change 
in  distance  was  real. 
1879.65          19?1        22^85        In        Cm5 
1890.57        191.1        32.19        2n        Glasenapp 

Evidently  without  change. 

H  281.    D.M.(16')4505.    8.7  ...  9.2 

RA.   =21h15">32s  ) 
Decl.=    +16'  14'  I 

1901.589               333?9               13-97 
.729               335.3               14.09 

RA.   =21  "17  -37'  ) 
Decl.  =    -  13*  23'  \ 

H  has  "  a  most  minute  point  strongly  suspected," 
and  gives  270°  :  13'  (1823).    I  have  looked  for  this 
many  times  in  the  last  twenty  years  with  various 
apertures,  without  finding  anything  of  this   kind. 
The  40-in.  shows  nothing  nearer  than  the  distant 
star  measured  in  1877. 

HA  165 

RA.    =  21"  19"  48S:  ) 
Decl.  =    -28°  50'  :  \ 

The  description  in  the  Harvard  Observations  is 

1901.66                 334.6               14.03 
No  change  since  measures  of   Leavenworth   in 
1896  and  Cin  in  1879.    H  made  the  distance  17  '52 
(1829.57). 

H  3023.     p  Equulei 
RA.   =21'-  16°  56s  ) 
Decl.  =    +    6°  18'  J 

A  and  B 
1901.509               258?3               33-'86 
.589               258.9               33.88 

137":  10'  ±  :  8J  .  .  .  11(1868.82).  There  certainly  is  no 
such  pair  in  or  anywhere  near  this  place.     I  looked 
for  it  in  1876,  and  again  with  the  40-in.     It  may  be 
identical  with  a  Cin  pair,  having  about  the  same  R.A., 
but  8°  north  of  the  Hd  place.  The  description  agrees: 
142?9  :  8^22  :  8  ...  10  (1879.54). 

H;5271.    10.6  .  .  .  11.6 

RA.   =21h20-44s  ) 
Decl.  =    —  25°  24    \ 

1901.55                 258.6               33.87 
CandD 

1901.760                 43?6                 6-'27 
.799                 48.0                 6.68 

1901.509               188U                 6.'13 
.589               187.6                 5.48 

1901.78                  45.8                 6.47 
Herschel  gives  : 

1901.55                 187.8                 5.80 
A  and  C 
1901.589               306?0               68M9 
A  and  E 
1901.589               275°3               93M9 

S  788.    7.2  ...  7.3 

RA.   =21"17'n31»  ) 
Decl.  =    -  -   7°    6'  \ 

1834.6        40?7        l.'5±        In        H 

H  1668.    8.4  ...  9.5 

RA.   =21h31m56s  ) 
Decl.  =    +23°     8  '  \ 

1901.414                 34?8                 8^16 
.416                 37.0                 8.31 
.473                 36.2                 8.23 

1900.473                 >y.  1                44  .'15 
.476                  88.0                44.43 

1901.43                  36.0                 8.23 
H  gives  34°2  •  7'-t-  •  10        12  (1828)     Xoted  as 

1900.47                   88.0               44.29 

double  in  A.G. 

63 


G4 


MEASURES  OF  DOUBLE  STARS 


H  941.    4  Pegasi.    6  ...  12.0 

R.A.   =  21»32m31s  ) 
Decl.  =    +    5°  14'  \ 

1901.471               337?  7               26?31 
.509               336.2               26.29 

H  285.    11.5  .  .  .  11.6 

R.A.    =21h39m    4s  ) 
Decl.  =    +10°     7'  \ 

1901.531                 66?  2                 7^44 
.604                 68.2                 7.85 

.512               338.3               26.10 

1901.66                   67.2                 7.64 

1901.50                 337.4               26.23 

H  called  the  small  star  17m.    The  large  star  has 
a  proper  motion  of  0'103  in  84?5  (Boss.).    The  only 
measures  are  : 
1878.71        344?9        25?95        In        ft 

S  798  =  $  VI.  103.    e  Pegasi 

R.A.    =  21h38T7s  / 
Decl.  =    +    9'  20'  \ 

H  estimated  distance  2"  to  3".    It  is  near  D.M. 
(10°)4617. 

?N.  74  =  H947.    7  .  .  .  10.7  .  .  .  11.7 

R.A.    =  21"  45-  57s  ) 
Decl.  =    +  19°  16'  \ 

A  and  B 
1901.799                 94?3               19  .'78 
.818                 94.1               20.15 

A  and  B 
1901.760               325?0               82^16 
.818               324.8               82.00 

1901.81                   94.2               19.96 
A  and  C 

IGTil     700                         QO*>0xl                         fM°QO 

1901.79                 324.9               82.08 

iyui./yy             ojz.4             .&±.oz 
.818               321.7               24.34 

A  and  C 
1901.760               320?  9             140^88 
.818               321.8             141.34 
.835               321.1              141.11 

1901.81                 322.0               24.33 

Not  measured  by  either  Herschel.   The  only  other 
measures  are  my  own  in  1879,  which  show  no  change. 

1901.80                 321.3             141.11 

The  proper  motion  of  A  is  very  small,  0'016  in 
132?9.    The  following  are  all  the  measures  : 

AB        1782.97        322?7         90^93        In        Tj. 
1879.54        325.2         81.36        2n        ft 
AC        1825.18        323.0       138.51        2n        South 
1874.77        321.6       140.41        3n        A 

Sh  336.    7.5  ...  8.1 

R.A.    =21"  52™  36s  ) 

Decl.  =    +    5°  27'  J 

1901.608               224?  8             10K05 
.739               224.5             100.68 

ji  Cygni 

R.A.   =21h38m46s  ) 
Decl.  =    +28°  12'  \ 

AandC 
1900.647               271?5               4XK99 
.684               271.2               41.06 

1901.67                 224.6             100.86 

The  other  measures  indicate  some  change  in  dis- 
tance. 
1823.77        226?0        105^86        In        Sh 
1881.56        224.9        102.17        3n        ft 

The  components  are  D.M.(5°)4915  and  4913. 

1900.66                 271.3               41.02 

This  12.2m  star  was  added  by  me  with  the  18|-in. 
The  only  measures  are  : 

1878.91        263?2        35^34        3n        ft 

With  this  place  and  the  proper  motion  of  A  (0'353 
in  135?4)  the  computed  position  of  C  at  the  above 
date  is  272?4  :  41  ^32.    It  is  therefore  evident  that  C 
does  not  belong  to  the  binary  system. 

H.  C.  Wilson 

R.A.    =  21h54m  :        ) 
Decl.  =    +    1°  20':  ( 

The  description  in  Cin10  is  212?1  :  1?20  :  8  .  .  .  9 
(1882.76)  In.    There  is  no  such  pair  in  or  near  this 
place.     All  the  stars   are  much   smaller  than  8m. 
The  description  is  not  unlike  S  2856,  which  is  51"/ 
and  3°n. 

64 


S.    W.    BURNHAM 


65 


Howe.    L  42909.    8  ...  10.8  ... 

ri 


RA.    =21"55m   0' 
Decl.  =    -  16° 


A  and  B 
271?6 
270.9 


1901.605 
.739 

1901.67       271.2 

AandC(=H5524) 
1901.605      292?4 
.739      291.9 


1901.67 


292.1 


9'12 
9.14 

9.13 


102-'02 
101.71 

101.86 


No  other  measures  of  AC.    AB  unchanged. 


H  289  =  H  5525.    20  Pegasi.    6  ...  11.4 


1901.799 

.818 


RA.    =  21"55<"14> 
Decl.  =    +  12°  33 

324?  6 
324.3 


52^98 
52.84 

52.91 


1901.81  324.4 

The  prior  measures  are : 

1878.95        325?5        51 '06        3»i        ft 

The  proper  motion  of  A  is  0'068  in  136?9,  which 
corresponds  to  the  change  in  distance  shown  by  the 
measures. 


OS  (App)  228.    8.1  ...  8.7 

RA.   =21h55">51s 
Decl.  =    +    4°  12' 


1901.512 
.604 


27?2 
27.4 


75^67 
75.60 


1901.56        27.3      75.63 

The  smaller  star  not  in  D.M.  The  other  is  D.M. 
(4°)4788.  A  has  a  proper  motion  of  0-'145  in  163?2, 
which  explains  the  change. 

1875.69        28?0        73-52        3n        J 
There  is  a  12m  star  from  A,  157  ?9 :  25T66  (1901.60) 


ir1  Pegasi 

RA.    =  22"   3-  54* 
Decl.  =    +32'  35' 

A  and  B.     B  =  13.5 
1900.684  317?6 

.687  316.9 


1900.68 


317.2 


27T42 
27.04 

27.23 


AandC.  C  = 
1900.684      262?3 
.687      262.3 


1900.68       262.3 

A  and  D.    D  =  11.5 
1900.684          89?3          187 -'49 
.687          89.3          187.51 


7K67 
71.74 

71.70 


Single  dist. 


1900.68 


89.3 


187.50 


The  only  prior  measures  are  mine  in  1879.  There 
is  an  error  in  the  printed  angle  of  AB;  it  should  be 
314?4. 


S  2866=H  1734 

RA.    =  22"   4"-  13s  t 
Decl.  -    -t-40'     4'  \ 

1901.722       53°3 
.796       53.6 


1901.76  53.4 

No  recent  measures,  but  unchanged. 


9'16 
9.18 

9.17 


1-1 


H  1735.    L  43266.    7^  ...  8.7  ...  11.2 

RA.    =22"   4-"21s 
DecL  =    +44=  15' 

A  and  B 

1901.608  110?1  27'18 

.758  110.1  27.07 


1901.68 

1901.608 

.758 


110.1 

BandC 

164?  7 

164.0 


27.12 

22^78 
22.70 


1901.68  164.3  22.74 

No  other  measures.    The  Decl.  in  H  is  1°  too 
large.    A  and  B  are  D.M.(44')4059  and  4060. 

H  3094.    10.7  .    .  10.7 


RA.  =22" 
Decl.  =    + 


'    9s 
21' 


1900.780 
1901.531 

1901.15 


301?6 
301.7 

301.6 


4- '80 
5.15 

4.97 


H  gives  315?5 :  3'=  :  10  ...  10  (1830).  A  little  p 
this,  and  about  2's  is  a  similar  pair,  components 
equal,  and  same  as  the  other  pair;  114?6 : 3'72 
(1901.15)  2n.  H  957, 310' ±  :2'±  :  11  ...  11+ (1820) 
should  be  20  'n  of  H  3094,  but  I  could  find  only  the 
pairs  measured,  and  the  last  named  probably  iden- 
tical with  one  of  the  others. 


65 


66 


MEASURES  OP  DOUBLE  STARS 


H  1741.    B.A.C.  7746.    6.2  ...  9.7 

R.A.    =22"  6ra29s  > 
Decl.  =    +  60°  14'  $ 

1900.684               308?  5               25?21 
.687               309.8               26.49 

S  2892  rej.    8.4  ...  11.1  ...  9.2 

R.A.    =22h12m55s  ) 
Decl.  =     -  11°  24'  \ 

A  and  B 
1901.760                 59?  1               Ilf86 

1900.68                 309.1               25.35 

.799                 56.0               11.53 

The  principal  star  has  a  proper  motion  of  0'151 
in  62°  5,  which  accounts  for  the  change. 

1828             328?  5        20  "±        In        H 
1876.29        316.8        23.22        In        J 

1901.78                   57.5               11.69 
AandC 
1901.760               263?  1               35^96 
.799               262.6               35.98 

1900.68        309.6        25.04        2n        Espin 

S  2875  rej.    S.D.(8°)5835.    8.8  ...  11.6 

R.A.    =  22h   7™  23s  ) 
Decl.  =      -    8"  24'  \ 

1901.605                 44?  1               15^00 
.758                 45.6               14.62 

1901.78                 262.8               35.97 
In  Mens.  Microm.,  p.  xxxiv,  2  gives  : 
1831.32             50?0             9'0 
1831.32           266.0           35.0 

Howe 
R.A.    =22h14ra:       ) 

1901.68                  44.8               14.81 
No  other  measures. 

91.49 

R.A.    =  22"  8m    3s  ) 
Decl.  =    +  60°  10'  \ 

Given  by  H  as  Class  I  with  angle  4?2  (1783.06). 
The  place  is  that  of  a  6.7m  star.     I  looked  for  this 
carefully  in  1876,  and  now  with  the  40-in.,  and  there 
is  certainly  nothing  there.    There  must  be  a  large 
error  in  place. 

H  293  =  S  2888  rej.    8.7  ...  11.0 

Decl.  =    +    5°    3':  \ 

The  measure  by  Howe  in  Gin5  is  121?6  :  1'03  : 
8.5  ...  9.0  (1879.64)  In.    This  pair  should  be  8'  south 
of  the  triple  30  Pegasi.    There  is  no  such  pair  either 
in  or  anywhere  near  the  given  place.    All  the  neigh- 
boring stars   were    examined.     It    is    undoubtedly 
identical  with  /3  842,  which  is  about  10rap  and  3  '  n  of 
the  place  given  above.    The  description  corresponds 
exactly. 

D.M.(10")4731.    8  ...  11 

R.A.   =22"14m25s  ) 
Decl.  =    +10°  26'  \ 

1901.589               305?  1               39^78 
.609               305.4               40.12 

R.A.    =  22»llm    2s  ) 
Decl.  =     +  12°  22'  \ 

1900.742               276°  8               18^41 
1901.509               276.8               18.80 
.512               275.4               18.44 

1901.60                 305.2               39.95 

H  observed  this  star  for  2  2998,  which  is  2m/; 
310?7  :  35"  ±    (1830).     He  called    the    components 
orange  :  blue.     A  appears  yellowish,  but  no  notice- 
able color  in  B. 

1901.25                 276.3               18.55 

This  is  D.M.(12°)4794.    The  only  prior  measures 
are  by  H,  276?4  :  10"  ±  :  9  .  .  .  13  (1820). 

H  3104.    S.D.(17°)6488.    9.3  ...  9.5 

H  3106.    -y  Aquarii 

R.A.    =22h15m27s  ) 
Decl.  =           1°  59'  $ 

1901.586               131?2               4U98 
.605               132.8               42.35 

R.A.    =  22"12m35s  > 
Decl.  =    -  17°  42'  \ 

1901.760                 76?  1               10^39 
.799                  74.8                10.15 

1901.59                 132.0               42.16 
The  only  measures  of  this  12.2m  star  are  : 
1838.76        125?9        49^46        In        Lament 
1878  72        129  6        43  87        In        ft 

1901.78                   75.5               10.27 
OnlyH,  83?9:8"±  (1830). 

The  principal  star  has  a  proper  motion  of  0'103 
in  80?5. 

66 


S.    W.    BURXHAM 


67 


OS  (App)  231.    L  43659.    8.2  ...  8.4 

RA.    =  22"  16"  37s  ) 
Decl.  =    +   9°  20'  i 

1901.608      110?2      90-'79 
.739      110.3      90.92 


1901.67  110.2 

The  only  measures  are : 

1875.74        109?8        91-02 


H  1756.    6.7  ...  10.6  ... 

RA.    =  22"  16- 42s) 
Decl.  =    +  40°     4'  \ 

A  and  B 

1901.722  286?6  21 '85 

.739  286.4  22.31 


1901.73 


286.5 
A  and  C  (new) 
1901.722  325?8 

.739  325.8 


22.08 

22^47 
22.39 


1901.73  325.8  22.43 

H  gives  for  AB  283?5  :  15'±  :  9  .  . .  12  (1828). 
The  magnitude  of  A  in  D.M.  is  6.5. 

H  3108  =  OS  (App)  232.    8.4  ...  8.4 

RA.    =22"  17"  34*  > 
Decl.  =    +    3*  14'  \ 

1901.799  190? 9  67T67 

.818  19D.9  67.49 


1901.81  190.9 

The  other  measures  are  : 

1875.98        190?4        65T72 


67.58 


4n 


W:  XXII.  382.    8.8...  9.0 

RA.    =  22h18"'31s  ) 
Decl.  =    +40"  18'  \ 

1901.473  52?3  6'59 

.722  55.0  6.49 

.739  53.6  6.69 


1901.64  53.6  6.59 

In  Weisse  "duplex  6"."    No  other  measures. 

H  3116.    D.M.(6=)5023.    9.5  ...  12.5 

RA.   =  22"  21 ->  15s  ) 
Decl.  =    +   6'  56'  \ 

1901.720  257?7  25^52 

1902.471  257.8  25.95 


1902.09  257.7  25.73 

No  measures  in  H  ;  "estimated  from  diagram." 


Harvard  Zones.    9.5  ...  9.6 


1901.720 
.760 

1901.74 


RA.   =22" 22"  53s 
Decl.  =    +    0°  40 

181?5 
182.5 


-I 


182.0 


3. '04 
3.22 

3.13 


Noted  in  Hd  Zones,  nf :  3'  ±.  No  other  measures. 
It  is  D.M.(0=)4879. 


1901.318 
.320 
.375 
.473 

1901.37 


Krueger  60 

RA.    =22h23-43s 
Decl.  =    +  57'     3 

A  and  B 
133?  3 
130.5 
131.4 
130.4 


•\ 


1901.318 
.320 
.375 
.473 

1901.37 


131.4 
A  and  C 

58?  8 
58.5 
58.4 
58.8 


58.6 
A  and  D 

98?7 
98.4 
98.5 


1901.318 
.328 
.375 

1901.34  98.5 

A  and  D.M.(56°)2784 

1901.318  144?62 

.320  144.72 

.375  144.63 

.474  144.52 


3-'25 
3.37 
3.38 
3.42 

3.35 


36 '59 
36.26 
36.69 
36.66 

36.55 


66-73 
66.95 
67.57 


1901.37 


144.62 


67.08 

199 -'31 
199.50 
199.15 
199.65 

199.40 


It  was  apparent  soon  after  the  first  remeasure- 
ment  of  A  by  Doolittle  that  these  stars  belonged  to 
the  type  of  61  Cygni,  where  the  change  in  the  relation 
of  the  components  is  due  to  their  different  proper 
motions.  These  are  small  stars,  and  their  movement 
in  space  had  not  been  noticed  by  meridian  observers 
and  those  interested  in  stellar  motions. 

To  determine  whether  or  not  the  third  star,  meas- 
ured by  me  in  1890,  has  any  proper  motion  of  its 
own,  I  have  connected  A  with  the  nearest  bright  star, 
D.M.(56°)2784.  The  positions  of  A  and  this  star  are 
in  the  A.  G.  catalogue,  and  these  give  for  the  relation 
of  the  two  151?9  :  195'35  (1873.2).  Comparing  this 
with  my  direct  measures,  assuming  that  the  distant 
star  is  fixed,  we  have  for  the  proper  motion  of  A 


67 


68 


MEASURES  OF  DOUBLE  STARS 


0?903  in  247?2.    The  present  measures  of  AC  and 
those  of  1890  make  this  value  0?927  in  244?9.    The 
close  agreement  of  these  results  makes  it  practically 
certain  that  the  change  is  solely  due  to  the  move- 
ment of  A.    Taking  the  mean,  0?915  in  246?0,  as  the 
best  value  for  this  motion,  and  my  measures  of  AB 

S  2933  rej.    D.M.(10°)4804.    9.2  ...  10.4 

R.A.   =22h36m49s) 
Decl.  =    +  10°  22'  J 

1901.586              218?  4                4?  10 
.589               215.3                 4.42 

in  1890  and  1901,  we  have  for  the  proper  motion  of 
B  0?702  in  the  direction  of  239?0. 

H5528 

R.A.    =  22"  31  -  22s) 
Decl.  =    +    8'  11'  \ 

H  gives  90°  ±  :  If  :  11  ...  12  (1823);  "elongated  ; 
not  fairly  divided."    The  place  is  exactly  that  of  the 
9.1m  star,  D.M.(8°)4902  =  W  '  XXII.  631.    I  looked 
at  this  star  with  the  6-in.  in  1876,  and  with  the  18«- 

1901.58                 216.8                 4.26 
No  other  measures. 

H  3139.    13  ...  13 

R.A.   =22h38m37s  ) 
Decl.  =    -|-    4    43'  \ 

1900.725               208?5                 2?17 
.742               221.7                 2.80 

in.  in  1877  without  seeing  any  indication  of  duplicity. 
I  could  find  no  pair  in  or  near  this  place  with  the 
40-in. 

H  5529.     K  Aquarii 

R.A.    =22"  31  '"32s  ) 
Decl.  =      -    4°  51'  \ 

H  describes  this  290°  ±  :4f  ±  (1827);  "an  ex- 
ceedingly minute  point  strongly  suspected."    I  have 
looked  in  vain  for  this  many  times  in  past  years. 
The  40-iu.  under  fine  conditions  failed  to  show  any 
companion.    The  principal  star  has  a  proper  motion 
of  0?142  in  219?2. 

£  Pegasi.    .  .  .  12.0 

R.A.    =  22h35">38s  ) 
Decl.  =    +  10°  12'  \ 

1900.515              139?  1              63?45 

1900.73                 215.1                 2.48 

Described  by  H,  142"  :  2  ±  :  11  =  11  (1830).    The 
pair  measured  is  in  the  correct  place  substantially, 
but  description  does  not  agree.    In  the  field  is  a 
triangle  of  llm  stars,  the  side  of  which  is  about  23". 
The  /  star  of  this  triangle  is  98?3  :  33  'I  from  A  of 
the  double. 

H  301.    |  Pegasi.    5  ...  12.2 

R.A.    =  22»40m42s  ) 
Decl.  =    +  11°  33'  \ 

1897.714               110?5               12?22 
1898.492               108.0               12.61 
.502               110.3               12.08 
1900.515               110.6               12.36 
.551               109.1               12.22 
.553               109.3               12.43 

.  551               138  .9               63  .  72 

1899.39                 109.6               12.32 

1900.53                139.0              63.58 
The  only  measures  are  : 
1879.54.       137?8        64?33        In        ft 

The  proper  motion  is  0?067  in  105?5,  and  this  ap- 
pears to  account  for  the  change  in  distance. 

9  N.  140.    L  44382.    6.5  ...  9.1 

R.A.    =22"  35™  51s  ) 
Decl.  =      -    5°  44'  \ 

1901.589               262?2               75?21 
.703               262.4               75.33 

H  called  the  small  star  18m,  and  gave  the  angle 
122?8  (1820).    There  are  no  other  early  measures. 
The  large  star  has  a  considerable  proper  motion, 
0-'541    in    158?9,    and    the    companion    is    moving 
with  it. 
1866.79        117?  7        12?  17        2n        A 
1879.38        112.6        11.93        4n        ft 

OS  480  =  H  1809 

R.A.    =22"  41  -"19s  ) 
Decl.  =    +57°  27'  \ 

1901.64                 262.3               75.27 

No  measures  in  Jf,  but  called  Class  II.     The 
place  is  given  by  H  as  above.    There  is  nothing  of 
Class  II  in  or  near  this  place. 

1900.742               117?3               30?76 

Without  change.     In  1873  I  thought  the  principal 
star  was  elongated,  but  it  was  round  with  all  powers 
at  the  time  of  the  above  measure. 

S.    W.    BUBNHAM 


9  VI.  97.    x2  Aquarii.    ...  9.5 


1900.647 
.666 


R.A.   =  22h43ra14s 
Decl.  =     -  14"  13' 

294?4 
293.9 


133^33 
132.95 


1900.65  294.1  133.14 

No  measures  in  the  last  seventy-five  years. 
1783.60        288?5        123.'61        In        $ 
1825.30        292.4        133.44        2n        S 

The  proper  motion  is  very  small,  0'059  in  227°5. 

H  1825.    D.M.(12')4904.    9.0  ...  93 

R.A.    =  22"  47-  50s  ; 
Decl.  =    +  12'  58'  { 

1900.553      223?2       I'.ll 
.666      222.2       1.77 


1900.61 


1.77 

(1828);   " 


222.7 

H  gave  230' ±  :  l'±  :  10  ...  11  (1S2S);  "very 
delicate;  could  not  verify  it,  having  mislaid  the  high 
power."  No  other  measures.  In  1876  I  looked  up 
and  estimated  distance  1  '2. 


H3152.    L  44810 

.A.    =  22"  48-  40'  > 
ecl.  =     -10'     I1  J 


Given  by  H  135?4 :  3"±  :  9  .  . .  15  (1830).  "  Large 
star  very  red.  A  very  difficult  object.  Measured 
with  320,  which  still  left  a  suspicion  of  illusion, 
though  I  have  hardly  a  doubt."  I  have  looked  for 
this  several  times  previously  with  apertures  up  to 
18^-in.,  but  have  never  seen  any  trace  of  a  companion. 
It  was  examined  on  two  nights  with  the  40-in. 


H  974.    D.M.(4°)4921.    8.7 

R.A.    =  22"  49-"  20s 
Decl.  =    +    4-  11' 

1901.529  88?6 

.531  88.3 


1901.53 


88.4 


.  9.7 


44  .'33 
44.27 

44.30 


H  has  91?5  :  40"  ±  :  9  .  .  .  12.    A  has  a  proper  mo- 
tion of  O'll  in  213?7  (Boss.). 


S  2972  rej.     D.M.(-  O')4451.    9.3  ...  11.7 

s  ) 
'  J 


R.A.    =  22h56'"34s 
Decl.  =      -    0    23' 


1901.589 
.605 

1901.60 


147?4 
148.5 

147.9 


15 '42 
15.56 

15.49 


Only  H,  who  has  198?0  :  12'  ±  :  9-10 ...  14  (1830). 
The  angles  do  not  agree.  Two  other  similar  pairs 
were  measured  in  the  immediate  vicinity.  The  first 
is  D.M.(-0°)4445, 159?1 :  24-'40  :  8.5 ...  12.7  (1901.60) 
In;  and  the  other  D.M.(-0  )4453,  172?7  : 19'14 :  10.8 
. .  .  10.9  (1901.60)  In.  The  latter  star  is  9.5m  in  D.M. 

H  3164.    L  45137.    6.9  ...  12 
R.A.   =22h58">52' 


Decl. 


=22h58">52'  / 
.  =    -  17°  44'  \ 


1901.586 

.758 


129?  5 
130.0 


1901.67  129.7 

Only  H,  136?5  :  30' ±  (1830). 

Christiania  A.O.  3744.    8.8 

R.A.  =23"  6-11' 
Decl.  =    +  65°  15 

1901.318      265?4 
.474      265.0 


•I 


55^05 
55.11 

55.08 


.  9.0 


14f83 
14.91 


1901.40  265.2  14.87 

No  change  since  my  measures  in  1891. 


1900.782 
1901.320 

1901.05 


H  1855.    10  ...  10 

R.A.   =  23"   6m  18' 
Decl.  =    +.44°  56 

111?2 
113.0 


'  ) 

'  J 


112.1 


4-44 
4.64 

4.54 


H  gives  296?7  :  !£' :  11  =  11  (1828).    Not  in  D.M., 
but  the  place  is  correct. 


22993 

R.A.    =23"   7 
Decl.  -      -    9' 


47' 
35' 


1900.515 
.744 


A  and  B 
176^6 
176.9 


25^41 
25.38 


1900.63  176.7  25.39 

No  relative  change,  but  they  have  a  common 
proper  motion  of  0'519  in  93?4.  There  is  a  distant 
star  not  moving  with  the  others. 

1900.515  114? 5  126 r08 

.666  114.5  126.17 

.744  114.5  125.85 


1900.61 
1824.82        109?2 


114.5 

158-17 


126.07 
2n        South 


69 


70 


MEASUEES  OF  DOUBLE  STARS 


P182 

R.A.    =23"  10™  52s  ) 
Decl.  =     -  14°  28'  \ 

A  and  B 
1900.742                 41?4                 0^60 

H  3185.    Neb  13.4 

R.A.    =  23h15">36s  ) 
Decl.  =    +   8°  U'  \ 

1901.720               164?  0               21?  12 
.760               163.3               21.37 

1901.586                  43.3                 0.56 

1901.74                 163.6               21.24 

1901.16                  42.3                 0.58 
AB  and  C 

1900.666                 77?5               69-'49 
.742                 77.7               69.56 
.744                 77.2               69.61 

Described  by  H,   160°  ±  :  14  ...  14  (1830);  "a 
double  with  some  nebulous  appendage."    A  of  the 
above  measures  is  a  faint  nebula  (Dreyer  7634).    No 
star  was  seen  in  the  nebula. 

HI  ft  QQ        77              1O             117 

1900.72                   77.5               69.55 

1901.586                 77?0               70^03 
.608                 77.4               70.20 

looy.     1.1  .  .  .  iz  .  .  .  ii.i 

R.A.   =  23h26m    4s  ) 
Decl.  =    +37°  39'  \ 

A  and  B 

1901.59                   77.2               70.11 

1900.706               241°4               44'05 
.744               241.1               43.80 

I  measured  the  distant  star  first  in  1898  in  order 
to  get  an  independent   value  for  the  large  proper 
motion  given  the  close  pair  from  meridian  observa- 
tions (U302  in  201?2). 

1898.66        79?9        68^04        2n        /3 

1900.72                 241.2               43.92 
AandC 
1900.706                 57?8               55^79 
.744                 57.1               55.84 

The  measures  indicate  that  this  unusually  large 
proper  motion  for  a  faint  star  is  substantially  correct. 

H  3183.    9.1  ...  12.1  ...  12.  1 

1900.72                   57.4               55.81 

H  gives  AB  238?2  :  20"  ±;  AC,  58?2  :  25"  ±  (1828). 
There  is  a  13.5m  star  from  A  211?8  :  29^6. 

R.A.   =  23hllm43s  ) 
Decl.  =      -    2"  23'  i 

A  and  B 
1901.605                 95?3               95^76 

Winnecke.    o.o  .  .  .  y.z 

R.A.    =23h26ra35s  ) 
Decl.  =    +30°  47'  \ 

1901.796               164?9                 1^59 
.815               166.0                 1.37 

.720                 95.9               95.60 

1901.80                 165.4                 1.48 

1901.66                   95.6               95.68 
BandC 
1901.605                 11?2                 4^37 
.720                 16.3                 4.34 

The  only  measures  are  : 
1863.85        168?5        If51        2n        Wn 

There  is  a  13.5m  star  133?2  :  23^4,  and  a  3'  pair 
of  10.5m  stars  in  the  field  sp.   The  principal  star  has 

1901.66                   13.7                 4.35 

A  is  S.D.(2°)5921.    H  gives  for  BC  12?3  :  2'  + 

(1830). 

9  VI.  61 

R.A.   =  23h14ra14s  ) 
Decl.  =    +    4°  44'  \ 

Herschel's  place  is  that  of  7  Piscium.    His  de- 

a proper  motion  of  0'148  in  61  ?4  (Kustner).    Evi- 
dently the  components  are  moving  together. 

5  N.  35  =  H  316.    6.9  ...  10.8 

R.A.    =23"  31  ""27s  ) 
Decl.  =     -  13°  44'  \ 

1901.608                 92?9               33^21 
.758                 92.7               33.09 
.796                 92.3               33.37 

scription  is,  "  they  form  a  triangle,  each  side  of  which 
is  about  1  ',"  and  speaks  of  it  as  near  the  bright  star. 
I  could  not  find  anything  here  which  could  be  satis- 
factorily identified. 

1901.72                  92.6               33.22 
The  only  prior  measures  : 
1877.83        92?7        33^22        In        ft 

70 


S.    W.    BUBNHAM 


71 


H  1898.    K  Andromedae.    4  ...  11.1  .  .  .  11.1 

XV..A.    —  £i&    O"i      *%J     f 

Decl.  =    +  43°  40'  \ 
A  and  B 
1901.625               191?9              46'82 

Egbert.    D.M.(16  )4980.    8.7  ...  8.8 

R.A.    =23h40m26s  / 
Decl.  =    +  16°  25    £ 

1901.608                 88?2                 U32 
.703                 85.5                 1.22 

.815              191.6              46.69 

1901.65                  86.8                 1.27 

1901.72                191.7              46.75 
A  and  C 

1901.625              294?  5             105  '08 
.815               294.8             104.83 

Given  with  approximate  place  in  Gin  : 
1879.66        89?0        1'37        2n        Gin 
Also  noted  as  double  in  A.G. 

1901.72                294.6             104.95 
The  proper  motion  of  A  is  0'078  in  107?8,  which 

J  28.    D.M.(62°)2296.    8.6  ...  10.8  .  .  .  101 

explains  the  change  in  the  distance  of  C. 

1879.24        188?  7        46?64        3n        ft 
1879.24        294.6      103.17        In        0 

W  XXIII.  696 

R.A.    =23h41ra325  > 
Decl.  =    +  62°  33'  \ 

A  and  B 

1900.742               357?9                 1'73 
1901.722               359.2                 1.56 

R.A.    =23"35m    7s) 
Decl.  =      -    5°    5'  ) 

"  Duplex  "  in  Weisse,  but  this  is  an  error,  as  this 
star  is  not  a  double  of  any  class.    The  wide  pair 

1901.23                 358.5                 1.64 
A  and  C 

1900.742               144?  7               10  '43 
1901.722               144.8               10.54 

measured  for  this  in  Gin*  is  lm  28*p  and  5-5n.    No 
change  in  that. 

1901.796       67?5       42'02        9.0...  9.  5        In 

S  3032  rej.    L  46416.    8.3  ...  10.0 

R.A.   =23h35m16s) 
Decl.  =    +  14°    T  \ 

1901.720              338?9              19*23 
.758               339.0               19.23 

1901.23                144.7               10.48 

Discovered  by  Dembowski  in  1876.     Only  his 
measures  : 

1877.29        358?6        1'61        3n        J 
1877.29        143.6      10.33        3n        J 

S  835.    20  Piscium.    6  ...  8.6 
R.A.    =23'-41m46*) 

1901.74                 338.9               19.23 
The  only  observations  by  H,  339?5  :  15'  ±  (1828). 

1900.553               285?0             172  -'65 
.666               285.3             172.81 

Harvard  Zones.    9.7  ...  13.0 

R.A.    =  23h35m50s) 
Decl.  =    +    0°  41'  \ 

1901.605               146?  0               75  -'64 
.608               146.3               75.64 

1900.61                 285.1             172.73 
The  only  prior  measures  are  : 
1824.83        287?2        170-'92        2n        South 

W2  XXIII  896 

1901.60                 146.1               75.64 

In  Hd  Zones  s/:  30'±  :  9  .  .  .  14.    A  is  D.M.(0°) 
5035. 

R.A.    =23h43™155  ) 
Decl.  =    +24°  41'  \ 

"  Duplex  "  in  Weisse,  but  certainly  not  double. 

71 


72 


MEASURES  OF  DOUBLE  STARS 


W  XXIII.  865 

R.A.    =  23h43m40s  ) 
Decl.  =    +16°  12'  \ 

"  Duplex  "  in  Weisse.     Examined  twice,  and  not 
a  double  of  any  kind. 

H  319.    D.M.(10°)5003.    9.5  ...  11.7 

R.A.    =  23h45m42s  ) 
Decl.  =    +10°  37'  $ 

1901.605                285?  1                15^49 
.608                284.3                15.29 

Camb.  A.G.  14394 

R.A.    =  23  ''54  -16s  ) 
Decl.  =    +26°  15'  \ 

Noted  in  Camb.  A.G.  as  a  "close  double."    I  have 
looked  at  this  6.5m  star  three  times  in  1901.    On  the 
last  occasion  85  Pegasi,  which  is  close  by,  was  easily 
measured.    At  no  time  was  there  any  indication  of 
this  star  being  a  double  of  any  kind. 

Duner.    D.M.(6°)5233.    9.0  ...  9.5 

1901.60                 284.7               15.39 
No  other  measures. 

W  XXIII.  1008.    9.0...  9.1 

R.A.    =  23»55ralls  ) 
Decl.  =    +7°     2'  \ 

1900.666               264?  8               15^04 
.668                263.8                15.11 

R.A.    =23h50m40s  ) 
Decl.  =           1°  11'  \ 

1900.780                253?4                1U86 
.782               254.0               11.76 

1900.66                 264.3               15.07 
The  only  measures  are  : 
1869.31        265?3        15  .'26        3n        Duuer 

1900.78                 253.7               11.81 
"  Duplex  "  in  Weisse.    No  other  measures. 

H  321.    7.5  ...  11.2 

R.A.    =  23h51™38s  ) 
Decl.  =    +10°  48'  \ 

1901.703               132?9               20^30 
.720               132.3               20.64 

P  733.    85  Pegasi 

R.A.    =  23»55m54s  > 
Decl.  =    +26°  27  '  \ 

A  and  B 
1900.854               253?0                 0-'97 

A  and  P 

1901.71                 132.6               20.47 
No  other  measures. 

1900.854               342?6               36-'65 
.873                342.1                36.55 

D.M.(10")5017.    8  ...  12.5 

Decl.  =    +  10°  35'  \ 

1901.608               122?  7               25^76 
.760                120.7                25.56 

1900.86                 342.3               36.60 

W1  XXIII.  1147 
R.A.    =23h56m49s  ) 

1901.68                 121.7               25.66 
Measured  the  first  time  by  mistake  for  the  pre- 
ceding pair,  H  321.    No  other  observations. 

Decl.  =     +    2°  43'  \ 

"  Duplex  "   in  Weisse.     There   is   no  companion 
star  near  enough  to  be  mentioned. 

II.   NEW  DOUBLE  STARS 


P  1291.    D.M.(37°)94.    8.4  .  . 

.12.8 

p  1292.     D.M.(3  )161.    8.5  .  . 

.9.0 

R.A.    =  Oh28m56s  / 
Decl.  =  +37°     2'  ( 

R.A.    =  1"   1™35S  f 
Decl.  =  +    3'  46'  ( 

1900.725               168?  7 
.742               169.0 
.780               169.6 

2.  '94 
'2.75 
2.85 

1900.780                 24?  5 
1901.586                  21.8 
.796                  26.4 

0^31 
0.36 
0.23 

1900.75                 169.1 

2.78 

1901.39                   24.2 

0.30 

72 


S.    W.    BfBXHAM 


73 


p  1293.    L  5287.    7.1  ...  10.7 

R.A.   =  2h45">56s  ) 
Decl.  =  +  46=  40'  \ 

1900.687               352?6                 K73 
.780               350.9                 1.68 
.782               352.9                 1.75 

slow  retrograde  motion  about  the  close  pair,  as  will 
be  seen  from  the  following  measures  : 

1829.79        311?4        1'58        in         2 
1846.44        304.6        1.61        3n        02 
1870.02        299.0        1.63        3>i        J 
1888.92        291.9        1.58        3«         ft 
1901.05        288  7         1  54        3n        ft 

1900.75                 352.1                 1.72 

Found  in  measuring  2  324  re/.,  which  is  2m  31s/ 
and  0-'9s. 

P  1294.    D.M.(46°)734.    8.8  ...  8.9 

R.A.   =3h12">24'/ 
Decl.  =  +46°  15'  > 

1901.589               228?  9                 6-'33 
.742               226.8                 6.26 
.758                227.7                  6.14 

The  small  star  D  was  added  by  me  with  the  36-in. 
The  only  other  measures  are  : 

1888.92        209?8        23'66        3n        ft 

With  this  position  and  the  proper  motion  of  AB 
the  place  of  C  at  the  date  of  my  last  measures  should 
be  212?3  :  23'16  (1901.05).     As  this  is  practically 
identical  with  the  measures,  it  is  certain  that  the 
small  star  does  not  belong  to  the  triple  system. 

1901.69                 227.8                 6.24 

The  components  are  red  and  green.    The  D.M. 
magnitude  of  A  is  9.2. 

P  1295.    2  CamelopardaJi.    5  ...  7 

R.A.    =  4h30">275  / 

Decl.  =  +53"  14'  } 

A  and  B 
1901.758               139?2                 0-'15 
.796               138.5                 0.25 
.818                140.7                  0.21 
.854                143.3                  0.24 

p  1296.    L  12112.    8.0  ...  8.5 

R.A.   =6h14m   6s  / 
Decl.  =  -     7°  12    \ 

1900.780               201  ?0                 0^21 

A  close  and  difficult  pair  found   in  measuring 
H  2315,  which  is  58s/  and  3  '2s. 

P  1297.    S.D.(22;)4158.    8.7  ...  9.5 

R.A.   =  16"  15m  10s  ( 
Decl.  =     -22'  21'  \ 

1901.359               140?6                 K91 
.395               137.0                 1.92 

1901  80                  140.4                  0.21 

.433                137.7                  1.90 

AB  and  C  (=2566) 
1900.780               290?0                 1T61 
.782               286.5                 1.60 
1901.589               289.5                 1.42 

1901.39                 138.4                 1.91 
Found  in  looking  for  H  4851. 

1901.05                  288.7                  1.54 
AB  and  D 
1900.780               212?  4               23'  13 
.782                212.5                23.35 
1901.589               213.6               23.30 

P  1298.    7.6  ...  8.9 

R.A.    =  16h53m49s  ) 
Decl.  =    +   9'  52'  \ 

A  and  B 
1901.531                 91?7                 0'26 

1901.05                 212.8               23.26 

.586 
.589                  84.8                  0.33 

The  principal  star  of  the  2  pair  is  a  close  and 
somewhat  unequal  double,  and  is  certainly  a  binary 
system,  and  probably  in  rapid  motion.    The  2  com- 
panion was  measured  by  me  in  1888  with  the  36-in., 
and  the  close  pair  would  have  been  detected  with  the 
present  distance.    The  large  star  has  a  proper  mo- 
tion of  O'lOO  in  153°2  (Porter),  which  is  also  the 

1901.57                   88.2                 0.29 

AB  and  C  (=  02  App  150) 
1901.359               165U               76  '44 
.375               164.9               76.62 
.586               164.8               76.57 

movement  of  the  old  companion.    That  star  is1  in 

1901.44                 165.0               76.54 

73 


74 


MEASURES  OF  DOUBLE  STARS 


C  and  D  (  =  2  2111  rej.).    8.5  ...  12 

BandC 

1901.359               164?0               23^91 

1900.551               336?  6 

0^66 

.375               164.5               24.19 

.553                337.1 

742                  341    1 

0  68 

1901.37                 164.2               24.05 

.    1    i  —                                     •  )  1    1    .    1 

.780               334.1 

0.62 

The  principal  star  of  this  wide  pair  is  a  close  and 
difficult  double.    The  only  other  measure  of  C  is  : 

1900.66                 337.2 

0.65 

1874.84        165?2        77^02        Bn        A 

This  is  27'/  and  3'ra  of  0  468. 

Probably  no  sensible  proper  motion,  as  the  me- 
ridian positions  by  Lamont  give  164?5  :  76  '74  (1844.5). 

P  1302.    D.M.(22°)4170.    8.2  ... 

12.3  ...  8.4 

The  close  pair  has  been  measured  at  Mt.  Hamilton  : 

R.A.   =  20h39m325  / 

1901.69        92?3        0^26        3n        Aitken 

Decl.  =    +  22°  45'  \ 

A  and  B 

No  other  measures  of  CD. 

1901.414                140?  2 

2^15 

.416                134.7 

2.03 

B  1299.    D.M.(10°)3337.    8.5  ...  8.5  ...  11.5 

.433               142.3 

2.21 

r                                       ^          ' 

R.A.    =  17h51m50s  ) 

1901.42                 139.1 

2.13 

Decl.  =    +  10°  58'  ( 

AandC 

A  and  B 

1901.414                209?0 

52  ?31 

1900.476               155?6                 0^48 

.416               208.5 

52.21 

.515                151.6                 0.55 

.433               209.2 

52.06 

1900.49                .153.6                 0.51 

1901.42                 208.9 

52.19 

AB  and  C 

C  is    D.M.(22°)4169.     The  A.G. 

positions    give 

1900.476                 63?  5               26  ^69 

208?0:5ir87. 

.512                 62.7               27.44 

.515                 62.7               27.13 

P  1303.    L  41147.    7  ... 

13.2 

1900.50                  63.0               27.09 

R.A.    =21"   6-"56s) 

Decl.  =    +    2"  19'  | 

The  close  pair  was  suspected  with  the  6-in.  in 
1872,  and  subsequently  overlooked  until  the  present 
time. 

1900.551               235?  0 
.553                237.5 

3^91 

4.00 

.725               236.9 

4.14 

p  1300.    30  SagMarii.    6  ...  13 

1900.61                 236.5 

4.02 

R.A.    =  18»43">38S  ) 

Decl.  =    -  22°  15'  \ 

P  1304.    L  41433.    8.1  .  . 

.  12.7 

1900.473               247?6               2U28 

R.A.    =  21h14m    7*  ) 

.512               245.6               21.40 

Decl.  =      -    2°     1'  \ 

1902.567               246.5               21.71 

1900.473                 57?1 

3^29 

1901.18                 246.6               21.46 

.476                 57.8 

3.23 

.515                 60.9 

2.82 

The  large  star  has  a  small  proper  motion,  0'075 

in  260?0. 

1900.49                    58.6 

3.11 

Found  in  looking  for  2  2778. 

P  1301.    L  37588.    8.5  ...  9.5  ...  9.5 

R.A.   =  19h40m25s  ) 

p  1305.    D.M.(12°)4622.    8.8  ... 

9.9  ...  10.5 

Decl.  =    +    4°    0'  \ 

R.A.    =21*39"'    9s  ) 

A  and  BC 

Decl.  =    +  10°  14  '  ) 

1900.551                 66?  3               56^76 

BandC 

.553                 66.7               56.89 

1901.531                  50?  8 

0^97 

.647                 67.0               56.74 

.760                 45.7 

0.98 

1900.58                   66.7               56.80 

1901.64                    48.2 

0.97 

74 


S.    W.    BURXHAM 


75 


A  and  BC 

C  and  D  (new).    12.9  .  .  . 

13.9 

1901.531                 90?9               88?46 

1900.742                 95?  7 

2.  '12 

.605                 91.5               88.87 

.780                101.4 

1.75 

1901.57                   91.2               88.66 

1901.758               102.4 
.854               106.2 

1.69 
1.85 

1901.28                 101.4 

1.83 

P  1306.    D.M.(22°)4484 

In  measuring  the  faint  star  C  as  a 

check  hereafter 

RA.   =  21h43m58s  ) 

on  the  proper  motion  of  AB  as  given  from  meridian 

Decl.  =    +23°     I'  J 

positions,  it  was  found  to  be  a  rather  difficult  pair. 

A  and  B.    8  ...  12.3 

C  has  not  been  measured  before. 

Porter  gives  the 

movement  ' 

1901.414               295?  7               31^25 

A       or-™  in  qn?n 

ling    star 

it  is  evi- 

f  A  is  cor- 

90%  since 

CORRECTIONS 

'Comparing 

3  of  Dem- 

i  of  A  we 

Page    5.    O.Arg.N.21.    For  2^592  read  22  .'59. 

movement 

13.    S  353  rej.    In  the  angle  by  H  for  56?4  read  65?4. 

nents  will 

18.    D.M.(21°)694.    In  the  note  for  10"  n  read  10'  n. 

e  between 
that  of  61 

28.    S  550.    For  L  15459  and  15460  read  14559  and  14560. 

lirs  where 

35.    Howe.    The  pair  measured  is  new.    The  Howe  pair  was  afterwards  found  and 

the  same 

identified  as  D.M.(24C)  2709. 

37.    S  2031  rej.    For  D.M.(-1°)3761  read  D.M.(-1°)3161. 

57.     0  Aquilae.     In  the  proper  motion  for  203?6  read  336?7. 

.  .135 

60.    OS  412  ri'j.    In  the  R.A.  for  41  m  read  42  »'. 

74.     p  1305.    For  D.H.  (12")4622  read  D.M.(10°)4622. 

20 

78 

32 

10 

A  and  B(  =  H  1770) 
1900.744               274?  7 

9.'06 

1900.73                 309.4                 6.93 

B  andC 

.782               273.7 

9.44 

1900.742               339?5               46-'49 

1901.720               273.8 

9.52 

.780               338.6               46.62 

1901.758               339.1               46.86 

1901.08                 274.1 

9.34 

The  close  pair  is  a  difficult  object.    H  gives  for 

1901.09                 339.1               46.66 

AB277?5:5'±  (1828). 

75 


74 


MEASUEES  OF  DOUBLE  STARS 


C  and  D  (=  S  2111  rej.).  8.5  ...  12 

1901.359      164?0      23^91 
.375      164.5      24.19 


1901.3?       164.2      24.05 

The  principal  star  of  this  wide  pair  is  a  close  and 
difficult  double.    The  only  other  measure  of  C  is  : 
1874.84        165?2        77^02        3n        A 

Probably  no  sensible  proper  motion,  as  the  me- 
ridian positions  by  Lament  give  164?5  :  76 '74  (1844.5). 
The  close  pair  has  been  measured  at  Mt.  Hamilton : 
1901.69        99?3        O.'2fi       3tt_ 

No  other  n 


1900.551 
.553 
.742 

.780 


BandC 
336?  6 
337.1 
341.1 
334.1 


1900.66  337.2 

This  is  27"/  and  3'n  of  /3  468. 


0^66 

0.68 
0.62 

0.65 


P  1302.    D.M.(22°)4170.    8.2  ...  12.3  ...  8.4 

R.A.    =  20h39m32s 
Decl.  =    +  22°  45' 


1299. 


1900.' 
.1 

1900. < 
1900.- 


1900.1 

The  close 
1872,  and  sut 
time. 


Decl.  =:    -  22°  15'  \ 

P  1304.     L,  41433.     8.1  .  . 

.  1Z.V 

1900.473               247?  6 

21?28 

R.A.    =  21"14m    7s  ) 

.512                245.6 

21.40 

Decl.  =      -    2°     1'  J 

1902.567               246.5 

21.71 

1900.473                 57?  1 

3^29 

1901.18                 246.6 

21.46 

.476                  57.8 

3.23 

.515                 60.9 

2.82 

The  large  star  has  a  small  proper 

motion,  0'075 

in  260?0. 

1900.49                   58.6 

3.11 

Found  in  looking  for  2  2778. 

P  1301.    L  37588.    8.5  ...  9.5 

.  .  .  9.5 

R.A.    =  19h40m25s  ) 

p  1305.    D.M.(12°)4622.    8.8  ... 

9.9  ...  10.5 

Decl.  =    +    4°    0'  \ 

R.A.    =  21h39m   9s  ) 

A  and  BC 

Decl.  =    +10°  14'  J 

1900.551                 66?  3 

56  .'76 

B  and  C 

.553                  66.7 

56.89 

1901.531                  50?  8 

0^97 

.647                  67.0 

56.74 

.760                 45.7 

0.98 

1900.58                   66.7 

56.80 

1901.64                  48.2 

0.97 

74 


S.    W.    BUBXHAM 


75 


A  and  BC 
1901.531                 90?9               88^46 
.605                 91.5               88.87 

C  and  D  (new).    12.9  .  .  .  13.9 

1900.742                 95?7                 2^12 
.780               101.4                 1.75 

1901.57                   91.2               88.66 

1901.758               102.4                 1.69 
.854               106.2                 1.85 

P  1306.    D.M.(22°)4484 

T>    4         __  01  h  AQ  m  *yj  s   ) 
£WA.      —  Zl      4O       OO      / 

Decl.  =    +23°    I'  J 
A  and  B.    8  ...  123 
1901.414               295?  7               31^25 
.416               294.4               31.64 
.433               294.9               31.05 

1901.28                 101.4                 1.83 

In  measuring  the  faint  star  C  as  a  check  hereafter 
on  the  proper  motion  of  AB  as  given  from  meridian 
positions,  it  was  found  to  be  a  rather  difficult  pair. 
C  has  not  been  measured  before.    Porter  gives  the 
movement  : 
A        0^203  in  90?0 
B        0.212  in  84.3 

He    says  that   the  value    for   the  preceding    star 

1901.42                 295.0               31.31 
C  and  D.    12.2  ...  12.6 
1901.414               346?  9                 I'Ol 
.433               337.5                 0.96 
-  .799               344.8                 1.68 

(Bradley  2953)  is  somewhat  uncertain,  and  it  is  evi- 
dent that  if  the  direction  of  the  motion  of  A  is  cor- 
rect, the  direction  of  B  must  be  more  than  90%  since 
the  stars  are  approaching  each  other.    Comparing 
the  measures  of  AB  given  above  with  those  of  Dem- 
bowski  in  1866,  with  Porter's  proper  motion  of  A,  we 

1901.55                 343.1                 1.22 
A  and  CD 
1901.414               275?9               33^03 
.416               275.6               32.88 
.433               276.2               32.84 

of  B.    The  nearest  approach  of  the  components  will 
occur  in  about  145  years,  when  the  distance  between 
them  will  be  only  2".    This  system  is  like  that  of  61 
Cygni,  and  a  large  number  of  similar  pairs  where 
the  respective  components  have  nearly  the  same 
movement  in  space. 

1901.42                 275.9               32.92 

P  1307.    53  Aquarii 

R.A.   =22"20m   3'[ 
Decl.  =     -  17°  21    \ 

A  and  B  (=  $  N.  41  =  Sh  345) 
1900.687               309?3                 6'99 

P  1308.    D.M.(12")4837.    9.4  ...  12.2  .  .  .  133 

RJL   =  22h26m18*  ) 
Decl.  =    +  12°  34'  \ 

BandC 
1900.782                 56?5                 U20 
.796                 62.2                 0.78 
.854                 71.9                 1.32 

.  <4z                 oU9.7                   b.oi 
.780               309.2                 6.92 

1901.81                   63.5                 1.10 

1900.73                 309.4                 6.93 
B  andC 
1900.742               339?  5               46  .'49 

A  and  B  (  —  H  1776) 
1900.744               274?7                 9^06 
.782               273.7                 9.44 
1901.720               273.8                 9.52 

.  <  80                008  .0                4b  .  bz 
1901.758               339.1               46.86 

1901.08                 274.1                 9.34 
The  close  pair  is  a  difficult  object     H  gives  for 

1901.09                 339.1               46.66 

AB277?5:5'±  (1828). 

75 


YE  02287 


